Find the period of [ x +4 x +9 x + +n^ 2 x ] :
Mathematics · JEE Main · NTA Exams — Sets, Relations and Functions
Find the period of \(\cos \left[\mathbf{x}+4 \mathbf{x}+9 \mathbf{x}+\ldots+n^{2} \mathbf{x}\right]\) :
- \(\frac{12 \pi}{n(n+1)(2 n+1)}\)
- \(12 \pi\)
- \(\frac{\pi}{n(n+1)}\)
- None of these
Answer
(D) None of these
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