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BITSAT2022MathematicsBinomial TheoremActual

The number of terms in the expansion of (1+5 2 x)^9+(1-5 2 x)^9 , is

Options

  1. A5
  2. B7
  3. C9
  4. D10

Correct answer

A. 5

Step-by-step solution

We have, (1+5 2 x)^9+(1-5 2 x)^9=2 ^2 C₀+ ^9 C₂(5 2 x)^2+ + ^9 C₈(5 2 x)^8 Clearly, it has 5 terms.

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