Description: Square of reciprocal is reciprocal of square. (Contributed by Mario Carneiro, 28-May-2016)
Ref | Expression | ||
---|---|---|---|
Hypotheses | expcld.1 | |
|
sqrecd.1 | |
||
Assertion | sqrecd | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | expcld.1 | |
|
2 | sqrecd.1 | |
|
3 | 2z | |
|
4 | 3 | a1i | |
5 | exprec | |
|
6 | 1 2 4 5 | syl3anc | |