The number of terms in the expansion of ${\{{(2 x + y^{3})}^{4}\}}^{7}$ is ___________.

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Solution

In {(2x + y³)⁴}⁷
n = ??
Since In (a + b)ⁿ ; number of terms is n + 1
∴ {(2x + y³)}²⁸
Number of terms is 28 + 1 = 29

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