Question

find the sum of an AP 2 ,5, 8, 11, 62​

Answer 1

Step-by-step explanation:

a+(n-1)d

62=2+(n-1)3

62=2+3n-3

62=3n-1

62+1=3n

63=3n

n=63/3=21

Answer 2

Step-by-step explanation:

AP

2,5,8,11,62

a=2 d=t2-t1=5-2=3

tn=a+(n-1)d

62=2+(n-1)3

62=2+3n-3

62=-1+3n

62+1=3n

63=3n

63/3=n

21=n

n=21