Question

In a arithmetic progression. Find the 20th term from the last term of the AP: 3,8,13,........253

1 point

258

58

98

158

​

Answer 1

Answer:

158

Step-by-step explanation:

T20=253+(20-1)-5

=253-95

=158

Answer 2

Step-by-step explanation:

Tn = 253

a = 3

d = 5

Tn = a+(n-1)d

253 = 3 + (n-1)*5

3-253=(n-1)*5

-250=(n-1)*5

-50 =(n-1)

-50+1=n

n=49

hence it is the 49th term of Ap