Question

Q.2: A) Solve any three activity. 1) Complete the following activity to find 21 term of the A.P. 4, 11. 18. Here a =4, na + 4 + d ,t? (forumla)​

Answer 1

Step-by-step explanation:

a=4 d=7 t=21

t=a+(n-1)d

21=4+(n-1)7

21-4/7=n-1

n-1=17/7

n-1=2.4

n=2.4+1=3.4