Math, asked by Sumit3671, 9 months ago

The 16th term of an ap is 5 times its 3rd term. If its 10th term is 41 then find the sum of its first 15 terms. use elimination meathod

Answers

Answered by shristirajpoot789

0

Answer:

a+15d=5*(a+2d)

a+15d=5a+10d

5d=4a

a+9d=41

5d/4+9d=41

41d/4=41

d=4,a=5

sum=15/2(10+56)

sum=15*33

495

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