Question

Evaluate 1/x^-2 for x = 7.
A. -49
B. 1/49
C. 49

Answer 1

The answer to this question is c

Answer 2

$\frac{a}{{b}^{n} } = a \times {b}^{ - n}$
Using this formula, it will become:
$1 \times {x}^{2}$
Which equals 1 x 7 x 7 which is 49...
Which means the answer is c..