1 | 1 | 1 | 2 | 1 | 1 | ||||||
( | + | )+ | ( | + | ) = ? Wychodzą mi jakieś | ||||||
(x+y)2 | x2 | y2 | (x+y)3 | x | y |
x2+y2 | 2(x+y) | ||
+ | = ... | ||
(x+y)2 * x2y2 | (x+y)3 *xy |
x−1 − a−1 | 1 | a+b | ||||
3) | , jeżeli x= | − ( | )−1 | |||
a−1 − b(ax)−1 | (a+b)−1 | a2+b2 |
a2+b2 | (a+b)2 | a2+b2 | ||||
x=(a+b)− | = | − | ||||
a+b | a+b | a+b |
a2+2ab+b2 | a2+b2 | 2ab | ||||
= | − | = | ||||
a+b | a+b | a+b |