Database
REAL AND COMPLEX NUMBERS
Order sets
Infinity and the extended real number system (cont.)
xadddilem
Next ⟩
xadddi
Metamath Proof Explorer
Ascii
Unicode
Theorem
xadddilem
Description:
Lemma for
xadddi
.
(Contributed by
Mario Carneiro
, 20-Aug-2015)
Ref
Expression
Assertion
xadddilem
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
Proof
Step
Hyp
Ref
Expression
1
simpl1
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
∈
ℝ
2
recn
⊢
A
∈
ℝ
→
A
∈
ℂ
3
recn
⊢
B
∈
ℝ
→
B
∈
ℂ
4
recn
⊢
C
∈
ℝ
→
C
∈
ℂ
5
adddi
⊢
A
∈
ℂ
∧
B
∈
ℂ
∧
C
∈
ℂ
→
A
B
+
C
=
A
B
+
A
C
6
2
3
4
5
syl3an
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
B
+
C
=
A
B
+
A
C
7
6
3expa
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
B
+
C
=
A
B
+
A
C
8
readdcl
⊢
B
∈
ℝ
∧
C
∈
ℝ
→
B
+
C
∈
ℝ
9
rexmul
⊢
A
∈
ℝ
∧
B
+
C
∈
ℝ
→
A
⋅
𝑒
B
+
C
=
A
B
+
C
10
8
9
sylan2
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
C
=
A
B
+
C
11
10
anassrs
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
C
=
A
B
+
C
12
remulcl
⊢
A
∈
ℝ
∧
B
∈
ℝ
→
A
B
∈
ℝ
13
12
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
B
∈
ℝ
14
remulcl
⊢
A
∈
ℝ
∧
C
∈
ℝ
→
A
C
∈
ℝ
15
14
adantlr
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
C
∈
ℝ
16
13
15
rexaddd
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
B
+
𝑒
A
C
=
A
B
+
A
C
17
7
11
16
3eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
C
=
A
B
+
𝑒
A
C
18
rexadd
⊢
B
∈
ℝ
∧
C
∈
ℝ
→
B
+
𝑒
C
=
B
+
C
19
18
adantll
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
B
+
𝑒
C
=
B
+
C
20
19
oveq2d
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
C
21
rexmul
⊢
A
∈
ℝ
∧
B
∈
ℝ
→
A
⋅
𝑒
B
=
A
B
22
21
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
B
=
A
B
23
rexmul
⊢
A
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
C
=
A
C
24
23
adantlr
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
C
=
A
C
25
22
24
oveq12d
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
B
+
𝑒
A
C
26
17
20
25
3eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
27
1
26
sylanl1
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
28
rexr
⊢
A
∈
ℝ
→
A
∈
ℝ
*
29
28
3ad2ant1
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
→
A
∈
ℝ
*
30
xmulpnf1
⊢
A
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
+∞
=
+∞
31
29
30
sylan
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
+∞
=
+∞
32
31
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
→
A
⋅
𝑒
+∞
=
+∞
33
21
12
eqeltrd
⊢
A
∈
ℝ
∧
B
∈
ℝ
→
A
⋅
𝑒
B
∈
ℝ
34
1
33
sylan
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
→
A
⋅
𝑒
B
∈
ℝ
35
rexr
⊢
A
⋅
𝑒
B
∈
ℝ
→
A
⋅
𝑒
B
∈
ℝ
*
36
renemnf
⊢
A
⋅
𝑒
B
∈
ℝ
→
A
⋅
𝑒
B
≠
−∞
37
xaddpnf1
⊢
A
⋅
𝑒
B
∈
ℝ
*
∧
A
⋅
𝑒
B
≠
−∞
→
A
⋅
𝑒
B
+
𝑒
+∞
=
+∞
38
35
36
37
syl2anc
⊢
A
⋅
𝑒
B
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
+∞
=
+∞
39
34
38
syl
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
+∞
=
+∞
40
32
39
eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
→
A
⋅
𝑒
+∞
=
A
⋅
𝑒
B
+
𝑒
+∞
41
40
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
+∞
→
A
⋅
𝑒
+∞
=
A
⋅
𝑒
B
+
𝑒
+∞
42
oveq2
⊢
C
=
+∞
→
B
+
𝑒
C
=
B
+
𝑒
+∞
43
rexr
⊢
B
∈
ℝ
→
B
∈
ℝ
*
44
renemnf
⊢
B
∈
ℝ
→
B
≠
−∞
45
xaddpnf1
⊢
B
∈
ℝ
*
∧
B
≠
−∞
→
B
+
𝑒
+∞
=
+∞
46
43
44
45
syl2anc
⊢
B
∈
ℝ
→
B
+
𝑒
+∞
=
+∞
47
46
adantl
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
→
B
+
𝑒
+∞
=
+∞
48
42
47
sylan9eqr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
+∞
→
B
+
𝑒
C
=
+∞
49
48
oveq2d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
+∞
50
oveq2
⊢
C
=
+∞
→
A
⋅
𝑒
C
=
A
⋅
𝑒
+∞
51
50
32
sylan9eqr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
+∞
→
A
⋅
𝑒
C
=
+∞
52
51
oveq2d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
+∞
53
41
49
52
3eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
54
xmulmnf1
⊢
A
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
−∞
=
−∞
55
29
54
sylan
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
−∞
=
−∞
56
55
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
→
A
⋅
𝑒
−∞
=
−∞
57
56
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
−∞
→
A
⋅
𝑒
−∞
=
−∞
58
34
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
−∞
→
A
⋅
𝑒
B
∈
ℝ
59
renepnf
⊢
A
⋅
𝑒
B
∈
ℝ
→
A
⋅
𝑒
B
≠
+∞
60
xaddmnf1
⊢
A
⋅
𝑒
B
∈
ℝ
*
∧
A
⋅
𝑒
B
≠
+∞
→
A
⋅
𝑒
B
+
𝑒
−∞
=
−∞
61
35
59
60
syl2anc
⊢
A
⋅
𝑒
B
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
−∞
=
−∞
62
58
61
syl
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
−∞
=
−∞
63
57
62
eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
−∞
→
A
⋅
𝑒
−∞
=
A
⋅
𝑒
B
+
𝑒
−∞
64
oveq2
⊢
C
=
−∞
→
B
+
𝑒
C
=
B
+
𝑒
−∞
65
renepnf
⊢
B
∈
ℝ
→
B
≠
+∞
66
xaddmnf1
⊢
B
∈
ℝ
*
∧
B
≠
+∞
→
B
+
𝑒
−∞
=
−∞
67
43
65
66
syl2anc
⊢
B
∈
ℝ
→
B
+
𝑒
−∞
=
−∞
68
67
adantl
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
→
B
+
𝑒
−∞
=
−∞
69
64
68
sylan9eqr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
−∞
→
B
+
𝑒
C
=
−∞
70
69
oveq2d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
−∞
71
oveq2
⊢
C
=
−∞
→
A
⋅
𝑒
C
=
A
⋅
𝑒
−∞
72
71
56
sylan9eqr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
−∞
→
A
⋅
𝑒
C
=
−∞
73
72
oveq2d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
−∞
74
63
70
73
3eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
75
simpl3
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
C
∈
ℝ
*
76
elxr
⊢
C
∈
ℝ
*
↔
C
∈
ℝ
∨
C
=
+∞
∨
C
=
−∞
77
75
76
sylib
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
C
∈
ℝ
∨
C
=
+∞
∨
C
=
−∞
78
77
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
→
C
∈
ℝ
∨
C
=
+∞
∨
C
=
−∞
79
27
53
74
78
mpjao3dan
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
80
31
ad2antrr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
∈
ℝ
→
A
⋅
𝑒
+∞
=
+∞
81
1
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
→
A
∈
ℝ
82
23
14
eqeltrd
⊢
A
∈
ℝ
∧
C
∈
ℝ
→
A
⋅
𝑒
C
∈
ℝ
83
81
82
sylan
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
∈
ℝ
→
A
⋅
𝑒
C
∈
ℝ
84
rexr
⊢
A
⋅
𝑒
C
∈
ℝ
→
A
⋅
𝑒
C
∈
ℝ
*
85
renemnf
⊢
A
⋅
𝑒
C
∈
ℝ
→
A
⋅
𝑒
C
≠
−∞
86
xaddpnf2
⊢
A
⋅
𝑒
C
∈
ℝ
*
∧
A
⋅
𝑒
C
≠
−∞
→
+∞
+
𝑒
A
⋅
𝑒
C
=
+∞
87
84
85
86
syl2anc
⊢
A
⋅
𝑒
C
∈
ℝ
→
+∞
+
𝑒
A
⋅
𝑒
C
=
+∞
88
83
87
syl
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
∈
ℝ
→
+∞
+
𝑒
A
⋅
𝑒
C
=
+∞
89
80
88
eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
∈
ℝ
→
A
⋅
𝑒
+∞
=
+∞
+
𝑒
A
⋅
𝑒
C
90
simpr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
→
B
=
+∞
91
90
oveq1d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
→
B
+
𝑒
C
=
+∞
+
𝑒
C
92
rexr
⊢
C
∈
ℝ
→
C
∈
ℝ
*
93
renemnf
⊢
C
∈
ℝ
→
C
≠
−∞
94
xaddpnf2
⊢
C
∈
ℝ
*
∧
C
≠
−∞
→
+∞
+
𝑒
C
=
+∞
95
92
93
94
syl2anc
⊢
C
∈
ℝ
→
+∞
+
𝑒
C
=
+∞
96
91
95
sylan9eq
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
∈
ℝ
→
B
+
𝑒
C
=
+∞
97
96
oveq2d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
+∞
98
oveq2
⊢
B
=
+∞
→
A
⋅
𝑒
B
=
A
⋅
𝑒
+∞
99
98
31
sylan9eqr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
→
A
⋅
𝑒
B
=
+∞
100
99
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
∈
ℝ
→
A
⋅
𝑒
B
=
+∞
101
100
oveq1d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
+∞
+
𝑒
A
⋅
𝑒
C
102
89
97
101
3eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
103
pnfxr
⊢
+∞
∈
ℝ
*
104
pnfnemnf
⊢
+∞
≠
−∞
105
xaddpnf1
⊢
+∞
∈
ℝ
*
∧
+∞
≠
−∞
→
+∞
+
𝑒
+∞
=
+∞
106
103
104
105
mp2an
⊢
+∞
+
𝑒
+∞
=
+∞
107
31
31
oveq12d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
+∞
=
+∞
+
𝑒
+∞
108
106
107
31
3eqtr4a
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
+∞
=
A
⋅
𝑒
+∞
109
108
ad2antrr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
=
+∞
→
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
+∞
=
A
⋅
𝑒
+∞
110
98
50
oveqan12d
⊢
B
=
+∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
+∞
111
110
adantll
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
+∞
112
oveq12
⊢
B
=
+∞
∧
C
=
+∞
→
B
+
𝑒
C
=
+∞
+
𝑒
+∞
113
112
106
eqtrdi
⊢
B
=
+∞
∧
C
=
+∞
→
B
+
𝑒
C
=
+∞
114
113
oveq2d
⊢
B
=
+∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
+∞
115
114
adantll
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
+∞
116
109
111
115
3eqtr4rd
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
117
pnfaddmnf
⊢
+∞
+
𝑒
−∞
=
0
118
31
55
oveq12d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
−∞
=
+∞
+
𝑒
−∞
119
xmul01
⊢
A
∈
ℝ
*
→
A
⋅
𝑒
0
=
0
120
1
28
119
3syl
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
0
=
0
121
117
118
120
3eqtr4a
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
−∞
=
A
⋅
𝑒
0
122
121
ad2antrr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
=
−∞
→
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
−∞
=
A
⋅
𝑒
0
123
98
71
oveqan12d
⊢
B
=
+∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
−∞
124
123
adantll
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
+∞
+
𝑒
A
⋅
𝑒
−∞
125
oveq12
⊢
B
=
+∞
∧
C
=
−∞
→
B
+
𝑒
C
=
+∞
+
𝑒
−∞
126
125
117
eqtrdi
⊢
B
=
+∞
∧
C
=
−∞
→
B
+
𝑒
C
=
0
127
126
oveq2d
⊢
B
=
+∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
0
128
127
adantll
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
0
129
122
124
128
3eqtr4rd
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
130
77
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
→
C
∈
ℝ
∨
C
=
+∞
∨
C
=
−∞
131
102
116
129
130
mpjao3dan
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
+∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
132
55
ad2antrr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
∈
ℝ
→
A
⋅
𝑒
−∞
=
−∞
133
1
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
→
A
∈
ℝ
134
133
82
sylan
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
∈
ℝ
→
A
⋅
𝑒
C
∈
ℝ
135
renepnf
⊢
A
⋅
𝑒
C
∈
ℝ
→
A
⋅
𝑒
C
≠
+∞
136
xaddmnf2
⊢
A
⋅
𝑒
C
∈
ℝ
*
∧
A
⋅
𝑒
C
≠
+∞
→
−∞
+
𝑒
A
⋅
𝑒
C
=
−∞
137
84
135
136
syl2anc
⊢
A
⋅
𝑒
C
∈
ℝ
→
−∞
+
𝑒
A
⋅
𝑒
C
=
−∞
138
134
137
syl
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
∈
ℝ
→
−∞
+
𝑒
A
⋅
𝑒
C
=
−∞
139
132
138
eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
∈
ℝ
→
A
⋅
𝑒
−∞
=
−∞
+
𝑒
A
⋅
𝑒
C
140
simpr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
→
B
=
−∞
141
140
oveq1d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
→
B
+
𝑒
C
=
−∞
+
𝑒
C
142
renepnf
⊢
C
∈
ℝ
→
C
≠
+∞
143
xaddmnf2
⊢
C
∈
ℝ
*
∧
C
≠
+∞
→
−∞
+
𝑒
C
=
−∞
144
92
142
143
syl2anc
⊢
C
∈
ℝ
→
−∞
+
𝑒
C
=
−∞
145
141
144
sylan9eq
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
∈
ℝ
→
B
+
𝑒
C
=
−∞
146
145
oveq2d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
−∞
147
oveq2
⊢
B
=
−∞
→
A
⋅
𝑒
B
=
A
⋅
𝑒
−∞
148
147
55
sylan9eqr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
→
A
⋅
𝑒
B
=
−∞
149
148
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
∈
ℝ
→
A
⋅
𝑒
B
=
−∞
150
149
oveq1d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
−∞
+
𝑒
A
⋅
𝑒
C
151
139
146
150
3eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
∈
ℝ
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
152
55
31
oveq12d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
+∞
=
−∞
+
𝑒
+∞
153
mnfaddpnf
⊢
−∞
+
𝑒
+∞
=
0
154
152
153
eqtrdi
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
+∞
=
0
155
120
154
eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
0
=
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
+∞
156
155
ad2antrr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
=
+∞
→
A
⋅
𝑒
0
=
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
+∞
157
oveq12
⊢
B
=
−∞
∧
C
=
+∞
→
B
+
𝑒
C
=
−∞
+
𝑒
+∞
158
157
153
eqtrdi
⊢
B
=
−∞
∧
C
=
+∞
→
B
+
𝑒
C
=
0
159
158
oveq2d
⊢
B
=
−∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
0
160
159
adantll
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
0
161
147
50
oveqan12d
⊢
B
=
−∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
+∞
162
161
adantll
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
+∞
163
156
160
162
3eqtr4d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
=
+∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
164
mnfxr
⊢
−∞
∈
ℝ
*
165
mnfnepnf
⊢
−∞
≠
+∞
166
xaddmnf1
⊢
−∞
∈
ℝ
*
∧
−∞
≠
+∞
→
−∞
+
𝑒
−∞
=
−∞
167
164
165
166
mp2an
⊢
−∞
+
𝑒
−∞
=
−∞
168
55
55
oveq12d
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
−∞
=
−∞
+
𝑒
−∞
169
167
168
55
3eqtr4a
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
−∞
=
A
⋅
𝑒
−∞
170
169
ad2antrr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
=
−∞
→
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
−∞
=
A
⋅
𝑒
−∞
171
147
71
oveqan12d
⊢
B
=
−∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
−∞
172
171
adantll
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
=
A
⋅
𝑒
−∞
+
𝑒
A
⋅
𝑒
−∞
173
oveq12
⊢
B
=
−∞
∧
C
=
−∞
→
B
+
𝑒
C
=
−∞
+
𝑒
−∞
174
173
167
eqtrdi
⊢
B
=
−∞
∧
C
=
−∞
→
B
+
𝑒
C
=
−∞
175
174
oveq2d
⊢
B
=
−∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
−∞
176
175
adantll
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
−∞
177
170
172
176
3eqtr4rd
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
∧
C
=
−∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
178
77
adantr
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
→
C
∈
ℝ
∨
C
=
+∞
∨
C
=
−∞
179
151
163
177
178
mpjao3dan
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
∧
B
=
−∞
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C
180
simpl2
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
B
∈
ℝ
*
181
elxr
⊢
B
∈
ℝ
*
↔
B
∈
ℝ
∨
B
=
+∞
∨
B
=
−∞
182
180
181
sylib
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
B
∈
ℝ
∨
B
=
+∞
∨
B
=
−∞
183
79
131
179
182
mpjao3dan
⊢
A
∈
ℝ
∧
B
∈
ℝ
*
∧
C
∈
ℝ
*
∧
0
<
A
→
A
⋅
𝑒
B
+
𝑒
C
=
A
⋅
𝑒
B
+
𝑒
A
⋅
𝑒
C