Question

Find the 5th term from the end of the ap 7 10 13 154

Answer 1

Answer:

142

Step-by-step explanation:

First term=a=7

Common difference=d=10-7=3

Last term=tn=154

Using formula;

tn= a + (n-1)d

154 = 7 + (n-1)3

154-7=3(n-1)

147/3=n-1

49=n-1

n= 49+1

n= 50

5th term from end is the 46th term

t46= 7 + 45×3 ...(using formula)

= 7 + 135

= 142