Question

please solve but step by step .​its urgent

Answer 1

Answer:

$(\frac{1}{2})^{-2} + (\frac{1}{3})^{-2} + (\frac{1}{4})^{-2}$

= (2)² + (3)² + (4)²                      [∵ $(\frac{a}{b})^{-n}= (\frac{b}{a})^{n}$  ]

= 4 + 9 + 16

= 29

Answer 2

answer : 4 + 9 + 16 = 13 + 16 = 29