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QJEEM23Mae294: JEE Main 2023 Mathematics - Class 11 JEEM23Mae294 Solution: The constant term in the expansion of is ___________.

The constant term in the expansion of (2x+1x7+3x2)5{\left( {2x + {1 \over {{x^7}}} + 3{x^2}} \right)^5} is ___________.

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Constant term in the expansion of

amp;(2x+1x7+3x2)5amp;1x35(2x8+1+3x9)5amp;1x35(1+x8(3x+2))5\begin{aligned}& \left(2 x+\frac{1}{x^{7}}+3 x^{2}\right)^{5} \\\\& \frac{1}{x^{35}}\left(2 x^{8}+1+3 x^{9}\right)^{5} \\\\& \frac{1}{x^{35}}\left(1+x^{8}(3 x+2)\right)^{5}\end{aligned}

Term independent of x=x= coefficient of x35x^{35} in

amp;5C4(x8(3x+2))4=amp;5C4 coefficient of x3 in (2+3x)4=amp;5C4×4C3(2)1(3)3=amp;5×4×2×27=amp;1080\begin{aligned}& ^{5} C_{4}\left(x^{8}(3 x+2)\right)^{4} \\\\= & { }^{5} C_{4} \text { coefficient of } x^{3} \text { in }(2+3 x)^{4} \\\\= & { }^{5} C_{4} \times{ }^{4} C_{3}(2)^{1}(3)^{3} \\\\= & 5 \times 4 \times 2 \times 27 \\\\= & 1080\end{aligned}

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