Class 11MathematicsSequences and Seriesnth term of special series, Sum to n terms and Infinite number of terms
EasyIf the sum of the first $n$ terms of a series is $5n^2 + 2n$,then its second term is
- A$7$
- B$17$
- C$24$
- D$42$
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DifficultAP EAMCET 2018
View SolutionIf $1^4+2^4+3^4+\ldots+n^4=f(n) \left(1^2+2^2+\ldots+n^2\right)$,for all $n \in N$,then $f(4)$ is equal to
Find the sum to $n$ terms of the series whose $n^{th}$ term is given by $a_n = n(n+1)(n+4)$.
Difficult
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