Question

if the 12th term is -13 and the sum of its first four terms is 24 find the sum of its first ten terms​

Answer 1

answer:

0

Step-by-step explanation:

first find a in 12 th term

then apply a to the sum of first four terms and find d

then find a in first equation

now find the sum of first 10 terms

as we know that

n=10

a=9

d=-2

and the answer is 0