Question

In an A.p. the first term is -2, the last term is - 29 and sum of all terms is -155. Find the 11th term of this A.P.

Answer 1

hey dear
here is your answer
given a=-2,l=-29,sn=-155,
using formula sn=n/2(a+l,)
-155=n/2(-2-29)
-310=-31n
n=10
now using formula an=a+(n-1)d
-29=-2+9d
-3=d
now a11=a+10d
= -2-30
= -32
hope it will help you
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