Social Sciences, asked by pradeepjhala69, 8 months ago

EX) given a=3,n=&S=192, find d
given .= 28, S= 144, and there are total 9 terms. Find .

Answers

Answered by viji18net

1

Answer:

S=144 l=28 n=9

Sn=n/2(a+l)

9/2(a+28)=144

a+28=32

a=4

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