Question

If 18 , a , b , -3 are in A.P,then find a+b.

Answer 1

Answer:

a=11

b=4

Step-by-step explanation:

Diff bw 18 and -3 is 21. There are 3 equal spaces between them. So length of each space would be 21/3=7.

So, a=18-7=11

b=11-6=4