Question

In an A.P ifd=3,a=1 then 10th term is

Answer 1

Step-by-step explanation:

given....a=1 and d=3

we known that.... the nth term of an AP formula is

$a \: n \: = a \: + \: ( \: n \: - \: 1 \: ) \: d$

they are asking to find the 10th term ...

so...here

$n \: = \: 10$

then substitute the values of a, d and n in nth term formula of AP

$a \: 10 = 1 + (10 - 1) \: 3 \\ a \: 10 = 1 + (9)3 \\ a \: 10 = 1 + 27 = 28$

therefore, the 10th of given AP is 28