Question

Find the number of terms in the AP 7,13,19,.................,205.

Answer 1

a+ (n-1)d=an
a= 7
.
.
d=13-7=6
.
.
7+(n-1)6=205
=》7+6n-6=205
=》6n=204
=》n=34
.
.
HENCE THERE ARE 34 TERM.✔✔✔✔

Answer 2

let

first term (a) =7

common difference (d) =13-7=6

last term =205

A.T.Q

205=7+(n-1)(6)

198/6=(n-1)

n=34

therefore total no. of terms are 34