Question

27. If 2* - 2X-1 = 4, then the value of x* is equal to:
is: A. O 625
B. O 256
C. 04
D. O 27​

Answer 1

Answer:

Let p, be the first term  i.e; 18

And, d, be the common difference,

From given series,

4th term =p+3d=−3

⟹18+3d=−3

Hence,  d=−7

So, a=p+d=18−7=11

And,  b=p+2d=18−14=4

Therefore,

a+b=11+4=15

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