Metamath Proof Explorer


Theorem xadddi2

Description: The assumption that the multiplier be real in xadddi can be relaxed if the addends have the same sign. (Contributed by Mario Carneiro, 20-Aug-2015)

Ref Expression
Assertion xadddi2 ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → A ⋅ 𝑒 B + 𝑒 C = A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C

Proof

Step Hyp Ref Expression
1 simpr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A ∈ ℝ → A ∈ ℝ
2 simp2l ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → B ∈ ℝ *
3 2 ad2antrr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A ∈ ℝ → B ∈ ℝ *
4 simp3l ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → C ∈ ℝ *
5 4 ad2antrr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A ∈ ℝ → C ∈ ℝ *
6 xadddi ⊢ A ∈ ℝ ∧ B ∈ ℝ * ∧ C ∈ ℝ * → A ⋅ 𝑒 B + 𝑒 C = A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C
7 1 3 5 6 syl3anc ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A ∈ ℝ → A ⋅ 𝑒 B + 𝑒 C = A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C
8 pnfxr ⊢ +∞ ∈ ℝ *
9 4 adantr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → C ∈ ℝ *
10 xmulcl ⊢ +∞ ∈ ℝ * ∧ C ∈ ℝ * → +∞ ⋅ 𝑒 C ∈ ℝ *
11 8 9 10 sylancr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → +∞ ⋅ 𝑒 C ∈ ℝ *
12 simpl3r ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → 0 ≤ C
13 0lepnf ⊢ 0 ≤ +∞
14 xmulge0 ⊢ +∞ ∈ ℝ * ∧ 0 ≤ +∞ ∧ C ∈ ℝ * ∧ 0 ≤ C → 0 ≤ +∞ ⋅ 𝑒 C
15 8 13 14 mpanl12 ⊢ C ∈ ℝ * ∧ 0 ≤ C → 0 ≤ +∞ ⋅ 𝑒 C
16 4 12 15 syl2an2r ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → 0 ≤ +∞ ⋅ 𝑒 C
17 ge0nemnf ⊢ +∞ ⋅ 𝑒 C ∈ ℝ * ∧ 0 ≤ +∞ ⋅ 𝑒 C → +∞ ⋅ 𝑒 C ≠ −∞
18 11 16 17 syl2anc ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → +∞ ⋅ 𝑒 C ≠ −∞
19 18 adantr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A = +∞ → +∞ ⋅ 𝑒 C ≠ −∞
20 xaddpnf2 ⊢ +∞ ⋅ 𝑒 C ∈ ℝ * ∧ +∞ ⋅ 𝑒 C ≠ −∞ → +∞ + 𝑒 +∞ ⋅ 𝑒 C = +∞
21 11 19 20 syl2an2r ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A = +∞ → +∞ + 𝑒 +∞ ⋅ 𝑒 C = +∞
22 oveq1 ⊢ A = +∞ → A ⋅ 𝑒 B = +∞ ⋅ 𝑒 B
23 oveq1 ⊢ A = +∞ → A ⋅ 𝑒 C = +∞ ⋅ 𝑒 C
24 22 23 oveq12d ⊢ A = +∞ → A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C = +∞ ⋅ 𝑒 B + 𝑒 +∞ ⋅ 𝑒 C
25 xmulpnf2 ⊢ B ∈ ℝ * ∧ 0 < B → +∞ ⋅ 𝑒 B = +∞
26 2 25 sylan ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → +∞ ⋅ 𝑒 B = +∞
27 26 oveq1d ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → +∞ ⋅ 𝑒 B + 𝑒 +∞ ⋅ 𝑒 C = +∞ + 𝑒 +∞ ⋅ 𝑒 C
28 24 27 sylan9eqr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A = +∞ → A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C = +∞ + 𝑒 +∞ ⋅ 𝑒 C
29 oveq1 ⊢ A = +∞ → A ⋅ 𝑒 B + 𝑒 C = +∞ ⋅ 𝑒 B + 𝑒 C
30 xaddcl ⊢ B ∈ ℝ * ∧ C ∈ ℝ * → B + 𝑒 C ∈ ℝ *
31 2 4 30 syl2anc ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → B + 𝑒 C ∈ ℝ *
32 0xr ⊢ 0 ∈ ℝ *
33 32 a1i ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → 0 ∈ ℝ *
34 2 adantr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → B ∈ ℝ *
35 31 adantr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → B + 𝑒 C ∈ ℝ *
36 simpr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → 0 < B
37 34 xaddridd ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → B + 𝑒 0 = B
38 xleadd2a ⊢ 0 ∈ ℝ * ∧ C ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ C → B + 𝑒 0 ≤ B + 𝑒 C
39 33 9 34 12 38 syl31anc ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → B + 𝑒 0 ≤ B + 𝑒 C
40 37 39 eqbrtrrd ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → B ≤ B + 𝑒 C
41 33 34 35 36 40 xrltletrd ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → 0 < B + 𝑒 C
42 xmulpnf2 ⊢ B + 𝑒 C ∈ ℝ * ∧ 0 < B + 𝑒 C → +∞ ⋅ 𝑒 B + 𝑒 C = +∞
43 31 41 42 syl2an2r ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → +∞ ⋅ 𝑒 B + 𝑒 C = +∞
44 29 43 sylan9eqr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A = +∞ → A ⋅ 𝑒 B + 𝑒 C = +∞
45 21 28 44 3eqtr4rd ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A = +∞ → A ⋅ 𝑒 B + 𝑒 C = A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C
46 mnfxr ⊢ −∞ ∈ ℝ *
47 xmulcl ⊢ −∞ ∈ ℝ * ∧ C ∈ ℝ * → −∞ ⋅ 𝑒 C ∈ ℝ *
48 46 9 47 sylancr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → −∞ ⋅ 𝑒 C ∈ ℝ *
49 xmulneg1 ⊢ −∞ ∈ ℝ * ∧ C ∈ ℝ * → − −∞ ⋅ 𝑒 C = − −∞ ⋅ 𝑒 C
50 46 9 49 sylancr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → − −∞ ⋅ 𝑒 C = − −∞ ⋅ 𝑒 C
51 xnegmnf ⊢ − −∞ = +∞
52 51 oveq1i ⊢ − −∞ ⋅ 𝑒 C = +∞ ⋅ 𝑒 C
53 50 52 eqtr3di ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → − −∞ ⋅ 𝑒 C = +∞ ⋅ 𝑒 C
54 xnegpnf ⊢ − +∞ = −∞
55 54 a1i ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → − +∞ = −∞
56 53 55 eqeq12d ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → − −∞ ⋅ 𝑒 C = − +∞ ↔ +∞ ⋅ 𝑒 C = −∞
57 xneg11 ⊢ −∞ ⋅ 𝑒 C ∈ ℝ * ∧ +∞ ∈ ℝ * → − −∞ ⋅ 𝑒 C = − +∞ ↔ −∞ ⋅ 𝑒 C = +∞
58 48 8 57 sylancl ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → − −∞ ⋅ 𝑒 C = − +∞ ↔ −∞ ⋅ 𝑒 C = +∞
59 56 58 bitr3d ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → +∞ ⋅ 𝑒 C = −∞ ↔ −∞ ⋅ 𝑒 C = +∞
60 59 necon3bid ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → +∞ ⋅ 𝑒 C ≠ −∞ ↔ −∞ ⋅ 𝑒 C ≠ +∞
61 18 60 mpbid ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → −∞ ⋅ 𝑒 C ≠ +∞
62 xaddmnf2 ⊢ −∞ ⋅ 𝑒 C ∈ ℝ * ∧ −∞ ⋅ 𝑒 C ≠ +∞ → −∞ + 𝑒 −∞ ⋅ 𝑒 C = −∞
63 48 61 62 syl2anc ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → −∞ + 𝑒 −∞ ⋅ 𝑒 C = −∞
64 63 adantr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A = −∞ → −∞ + 𝑒 −∞ ⋅ 𝑒 C = −∞
65 oveq1 ⊢ A = −∞ → A ⋅ 𝑒 B = −∞ ⋅ 𝑒 B
66 oveq1 ⊢ A = −∞ → A ⋅ 𝑒 C = −∞ ⋅ 𝑒 C
67 65 66 oveq12d ⊢ A = −∞ → A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C = −∞ ⋅ 𝑒 B + 𝑒 −∞ ⋅ 𝑒 C
68 xmulmnf2 ⊢ B ∈ ℝ * ∧ 0 < B → −∞ ⋅ 𝑒 B = −∞
69 2 68 sylan ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → −∞ ⋅ 𝑒 B = −∞
70 69 oveq1d ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → −∞ ⋅ 𝑒 B + 𝑒 −∞ ⋅ 𝑒 C = −∞ + 𝑒 −∞ ⋅ 𝑒 C
71 67 70 sylan9eqr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A = −∞ → A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C = −∞ + 𝑒 −∞ ⋅ 𝑒 C
72 oveq1 ⊢ A = −∞ → A ⋅ 𝑒 B + 𝑒 C = −∞ ⋅ 𝑒 B + 𝑒 C
73 xmulmnf2 ⊢ B + 𝑒 C ∈ ℝ * ∧ 0 < B + 𝑒 C → −∞ ⋅ 𝑒 B + 𝑒 C = −∞
74 31 41 73 syl2an2r ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → −∞ ⋅ 𝑒 B + 𝑒 C = −∞
75 72 74 sylan9eqr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A = −∞ → A ⋅ 𝑒 B + 𝑒 C = −∞
76 64 71 75 3eqtr4rd ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B ∧ A = −∞ → A ⋅ 𝑒 B + 𝑒 C = A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C
77 simpl1 ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → A ∈ ℝ *
78 elxr ⊢ A ∈ ℝ * ↔ A ∈ ℝ ∨ A = +∞ ∨ A = −∞
79 77 78 sylib ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → A ∈ ℝ ∨ A = +∞ ∨ A = −∞
80 7 45 76 79 mpjao3dan ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 < B → A ⋅ 𝑒 B + 𝑒 C = A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C
81 simp1 ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → A ∈ ℝ *
82 xmulcl ⊢ A ∈ ℝ * ∧ C ∈ ℝ * → A ⋅ 𝑒 C ∈ ℝ *
83 81 4 82 syl2anc ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → A ⋅ 𝑒 C ∈ ℝ *
84 83 adantr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 = B → A ⋅ 𝑒 C ∈ ℝ *
85 xaddlid ⊢ A ⋅ 𝑒 C ∈ ℝ * → 0 + 𝑒 A ⋅ 𝑒 C = A ⋅ 𝑒 C
86 84 85 syl ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 = B → 0 + 𝑒 A ⋅ 𝑒 C = A ⋅ 𝑒 C
87 oveq2 ⊢ 0 = B → A ⋅ 𝑒 0 = A ⋅ 𝑒 B
88 87 eqcomd ⊢ 0 = B → A ⋅ 𝑒 B = A ⋅ 𝑒 0
89 xmul01 ⊢ A ∈ ℝ * → A ⋅ 𝑒 0 = 0
90 89 3ad2ant1 ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → A ⋅ 𝑒 0 = 0
91 88 90 sylan9eqr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 = B → A ⋅ 𝑒 B = 0
92 91 oveq1d ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 = B → A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C = 0 + 𝑒 A ⋅ 𝑒 C
93 oveq1 ⊢ 0 = B → 0 + 𝑒 C = B + 𝑒 C
94 93 eqcomd ⊢ 0 = B → B + 𝑒 C = 0 + 𝑒 C
95 xaddlid ⊢ C ∈ ℝ * → 0 + 𝑒 C = C
96 4 95 syl ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → 0 + 𝑒 C = C
97 94 96 sylan9eqr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 = B → B + 𝑒 C = C
98 97 oveq2d ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 = B → A ⋅ 𝑒 B + 𝑒 C = A ⋅ 𝑒 C
99 86 92 98 3eqtr4rd ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C ∧ 0 = B → A ⋅ 𝑒 B + 𝑒 C = A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C
100 simp2r ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → 0 ≤ B
101 xrleloe ⊢ 0 ∈ ℝ * ∧ B ∈ ℝ * → 0 ≤ B ↔ 0 < B ∨ 0 = B
102 32 2 101 sylancr ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → 0 ≤ B ↔ 0 < B ∨ 0 = B
103 100 102 mpbid ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → 0 < B ∨ 0 = B
104 80 99 103 mpjaodan ⊢ A ∈ ℝ * ∧ B ∈ ℝ * ∧ 0 ≤ B ∧ C ∈ ℝ * ∧ 0 ≤ C → A ⋅ 𝑒 B + 𝑒 C = A ⋅ 𝑒 B + 𝑒 A ⋅ 𝑒 C