Question

6,38,70,102.....21th term of this Ap is​

Answer 1

Answer:

a²¹= 646

Step-by-step explanation:

a=6

d=a²-a¹

d=38-6=32

a²¹=a+20d

a²¹=6+20×32

a²¹=6+640

a²¹=646

Answer 2

Answer:

a=6

d=38-6=32

n=21

an=a+(n-1)d

a21=6+(21-1)32

6+(20)32

6+640

646

a21=646