What is the value of (\frac{1}{2})^{-2}+(\frac{1}{3})^{-2}+(\frac{1}{4})^{-2} ?

Sainik School Entrance Exam 2021 Solved Paper

Question : 30 of 150

Marks: +1, -0

What is the value of

({1}/{2})^{-2}+({1}/{3})^{-2}+({1}/{4})^{-2}

Solution:

(d)

({1}/{2})^{-2}+({1}/{3})^{-2}+({1}/{4})^{-2}=(2)^2+(3)^2+(4)^2

=4+9+16=29

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