Question

how many terms of AP 9,17,25

Answer 1

$a = 9 \\ d = 17 - 9 \\ an = 25 \\ an = a + {n - 1}d \\ 25 = 9 + {n - 1}9 \\ \\ answer \: is \: 14upon9$

Answer 2

given...
AP =9,17,25
a=9
d=17-9=25-17=8
an (or)l=25
n=?
an=a+(n-1)(d)
25=9+(n-1)(8)
16=8n-8
24=8n
n=24/8
n=3...
therefore 3 terms are there in AP 9,17,25