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AP EAMCET202022 Sep 2020Evening ShiftMathematicsBinomial TheoremActual

If 12 2 k-1 = 12 k+1 , then find k

Options

  1. A3
  2. B6
  3. C9
  4. D4

Correct answer

D. 4

Step-by-step solution

It is given that, 12 2 k-1 = 12 k+1 So, either 2 k-1=k+1 or aligned & 2 k-1+k+1=12 k=2 or k & =4 . & If . ^n C_x= ^n C_y then either, x=y or x+y=n aligned Hence, option (4) is correct.

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