Question

If 18 a b, -3 e are in AP the a + b the equal to

Answer 1

Answer:

ANSWER IS 15

Step-by-step explanation:

tn = a + (n-1)d

t4 = 18 + 3d = - 3

3d = - 21

d = - 7

So, the AP is 18, 11, 4, - 3, - 10

So, a + b = 11 + 4 = 15