CBSE Class 10 Maths (Standard) 2020 · Paper 30/5/1 · Question 31

Arithmetic Progressions 3 marks Medium

For an A.P., it is given that the first term

(a) = 5

, common difference

(d) = 3

, and the

n^{t h}

term

(a_{n}) = 50

. Find

n

and sum of first

n

terms

(S_{n})

of the A.P.

Answer

n = 16

and

S_{n} = 440

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