Question

If 18,a,b,-3 are in Arithmetic Progression then find the value of (a+b). Answer only if you know plss do not answer that you don't know the answer.

Answer 1

Step-by-step explanation:

Let a and d be any constants such that:

(a-3d), (a-d), (a+d), (a+3d) are in A.P.

∴a−3d=18 .....(1)

∴a−d=A .....(2)

∴a+d=B .....(3)

∴a+3d=−3 .....(4)

From eq(1) and eq(4):

a=

2

15

& d=−

2

7

∴A=a−d=11

∴B=a+d=4 (Ans → C)

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Answer 2

Answer:

option C

Step-by-step explanation:

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