Math, asked by prash7872, 4 months ago

the first term of an AP is 3, last term is 83 and sum of all terms is 903. find the number of terms in Ap

Answers

Answered by preetipradiptabehera

1

Step-by-step explanation:

as we know sn=a+l/2*n then sn = 3+83/2*n sum of number= 903 then 903=86/2 then n will be 903*2/86=21

Answered by shishirgyawali891

1

Answer:

answer:21

by using the formula Sn=n/2(a+L)

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