Question

Find the sum of first 17 terms of an ap where 4th and 9th terms are -15 and -30

Answer 1

Hey bud!!

given that..

a4 = -15... and..

a9= -30.

now .

a+(4-1)d= a4

a+3d = -15...............1

and.

a+(9-1)d= -30

a+8d =-30................2

eq 1-eq 2

d= -3

and a= -6

on putting the respective values for first 17 terms.. we get the terms..

-6, -9, -12.......

find till 17 terms..

hope it helps.

aur brainliest lgana mat bhoolio ✌✌

Answer 2

hiii

hw r u?????.........