Question

evaluate and express the result as positive exponent (-2/7)^-3×(-2/7)-4​

Answer 1

$( \frac{ - 2}{7} {)}^{ - 3} \times ( \frac{ - 2}{7} {)}^{ - 4}$

$\blue{ \boxed{ {a}^{m} \times {a}^{n} = {a}^{m + n} }}$

$\implies( \frac{ - 2}{7} {)}^{ - 3 - 4}$

$\implies( \frac{ - 2}{7} {)}^{ - 7}$

$\blue{ \boxed{ {(\frac{a}{b}) }^{ - m} = {( \frac{b}{a} )}^{m} }}$

$\orange{\therefore (\frac{ - 7}{2}) ^{7} }$

HOPE IT HELPS!