Question

The 15th term of an arithmetic progression has the value 0. Which term ofap is 4 times the 26th elemet is

Answer 1

Answer:

31

Explanation:

a15=0

a+(15-1)d=0

a+14d=0

a=-14d

now

a26=a+25d=-14d+25d=11d

now

a+(n-1)d=4(a+25d)

-14d+(n-1)d=4(11d)

n=31