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Question

Find the value of 

The correct answer is

146

\(\left(\frac14\right)^{-2}+\left(\frac19\right)^{-2}+\left(\frac17\right)^{-2}=16+81+49=146\)

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Important Questions from Surds and Indices

  1. The cube root of - 64 × - 1331 is:

  2. If (27) m = (81) n, then m 2: mn = ?

  3. if 49 n +  49 n  +  49 n  +  49 n  +  49 n  +  49 n +  49 n  = 7 2221 , then n = ? 

  4. If a x= b y= c zand b 2= ac then y =

  5. The value of (0.3) [{(200 - 146)/(3 × 3 × 3)} - 3] is:

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