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  • The number of non-zero terms in the expansion of <img alt="(1+3 \sqrt{2} x)^9+(1-3 \sqrt{2} x

The number of non-zero terms in the expansion of (1+3 \sqrt{2} x)^9+(1-3 \sqrt{2} x)^9

Option: 1

9


Option: 2

0


Option: 3

5


Option: 4

10


Answers (1)

best_answer

Given expression,

\begin{aligned} & =2\left[1+{ }^9 C_2(3 \sqrt{2} x)^2+{ }^9 C_4(3 \sqrt{2} x)^4\right. \left.+{ }^9 C_6(3 \sqrt{2} x)^6+{ }^9 C_8(3 \sqrt{2} x)^8\right] & \end{aligned}

\therefore The number of non-zero terms is 5.

Posted by

jitender.kumar

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