Question

Valoarea maximă a nr -x la a-2 -1

Answer 1

${ - x}^{ - 2} = \frac{1}{ { - x}^{2} } = \frac{1}{{x}^{2} } \\ \frac{1}{ {x}^{2} } = 0 \\ x = 1 \\ { - x}^{ - 1} = \frac{1}{ - x} \\ \frac{1}{ - x} = 0 \\ - 1 = - x \\ x = 1$