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Question

Find the value of (1/6)⁻²+(1/5)⁻²+(1/4)⁻².

The correct answer is

77

\(6^2+5^2+4^2=77\)

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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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