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Class 10 Mathematics Arithmetic Progressions (AP)Finding the sum of the first $n$ terms of an APExpert

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For an arithmetic progression (S_n=5n^2-3n). What is the (11)th term?

Answer and explanation

Correct answer: (102)

(a_{11}=S_{11}-S_{10}), so the value is (572-470=102). Exam tip: use (S_n-S_{n-1}) to find a particular term.

Related tags

Ap Sum-To-Term Expert Finding The Sum Of The First $N$ Terms Of An Ap Finding The Sum Of The First N Terms Of An Ap Arithmetic Progressions (Ap)Arithmetic Progressions Ap Mathematics

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