Question

If 18, a, b-3 are in Ap then find a+b​

Answer 1

Answer:

a+b=15

Step-by-step explanation:

If 18,a,b,-3 are in AP then:

a-18=-3-b

a+b=18-3

a+b=15

Answer 2

Answer:

Good Morning.......

a1 = 18

a2 = a

a3 = b

a4 = -3

Rule :- a2-a1 = a4-a3

a-18 = -3-b

a+b = -3+18

a+b = 15

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