Metamath Proof Explorer
Description: Raising a number to the fourth power is equivalent to squaring it twice.
(Contributed by SN, 21-Aug-2024)
|
|
Ref |
Expression |
|
Hypothesis |
flt4lem.a |
|
|
Assertion |
flt4lem |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
flt4lem.a |
|
2 |
|
2t2e4 |
|
3 |
2
|
oveq2i |
|
4 |
|
2nn0 |
|
5 |
4
|
a1i |
|
6 |
1 5 5
|
expmuld |
|
7 |
3 6
|
eqtr3id |
|