(1/2)-2 + (1/3)-2 + (1/4)-2 = ?A. 61/144B. 144/61C. 29D. 1/29

1.	(1/2)-2 + (1/3)-2 + (1/4)-2 = ?A. 61/144B. 144/61C. 29D. 1/29
Answer» \((\frac{1}{2})^{-2}+(\frac{1}{3})^{-2}+(\frac{1}{4})^{-2}\) = \((\frac{2}{1})^2+(\frac{3}{1})^2+(\frac{4}{1})^2\) = 2²+3²+4² = 4+9+16 = 29

Answer»

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

= 2²+3²+4²

= 4+9+16

= 29

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