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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
In the expression
$(x+1)(x+4)(x+9)(x+16)\cdots(x+400)$
the coefficient of $x^{19}$ is
Solution
Coefficient of $x^{19}$ equals sum of constants: $1+4+9+\cdots+400$ This is sum of squares from $1^2$ to $20^2$: $\frac{20(21)(41)}{6}=2870$ Answer: $\boxed{2870}$Online Test Series, Information About Examination,
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