Question

2. If 18.a, b, -3 are in AP, then a + b =
​

Answer 1

Step-by-step explanation:

= If 18, a, b, -3 are in AP

Then,

= - 3 - b = a-18

= a+b = - 3+18=15

Answer 2

Step-by-step explanation:

refer to the attachment