Question

First term is 4 and 9th term is 20 then find 15th term

Answer 1

answer is in image good luck for future

Answer 2

Answer:

t1=4

t9=20

t15=?

from t9

tn=a+(n-1)d

20=a+(9-1)×2

a=20-16

therefore,a=4

t15=4+(15-1)×2

therefore,t15=32