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BITSAT2009MathematicsQuadratic EquationActual

(10^n+3 (4^ n+2 )+5 ) is divisible by ((n N) )

Options

  1. A7
  2. B5
  3. C9
  4. D17

Correct answer

C. 9

Step-by-step solution

( aligned & 10^n+3 (4^ n+2 )+5 Taking n=2, & 10^2+3 4^4+5=100+768+5=873 aligned ) Therefore this is divisible by 9.

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