Question

write first four term of AP when the first term a and common difference d are given (1) a=10 d=10 (2) a=-2 d=3​

Answer 1

Answer:

1) a_4 = 40

1)a_4 = 7

Step-by-step explanation:

Given,

1) a = 10 , d = 10

2) a = - 2 , d = 3

To Find :-

Fourth term of an A.P

Formula Required :-

$a_n=a+(n-1)d$

Solution :-

1) a = 10 , d = 10

$a_4 = 10+(4-1)10$

= 10 + (3)10

= 10 + 30

= 40

$a_4=40$

2) a = -2 , d = 3

$a_4=-2+(4-1)3$

= - 2  + (3)3

= - 2 + 9

= 7

$a_4=7$