MCQ
$\left(2 x+\frac{1}{x^7}+3 x^2\right)^5$ ના વિસ્તરણમાં અચળ પદ $............$ છે.
- A$1089$
- B$1080$
- C$1050$
- D$1562$
For constant term,
$n _1+2 n _3=7 n _2$
$n _1+ n _2+ n _3=5$
Only possibility $n _1=1, n _2=1, n _3=3$
$\Rightarrow$ constant term $=1080$
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