Question

If 3 , y, 81 are in A. P then y = ?

Answer 1

If (2^x) (2^y) = 8 and (9^x)(3^ y) = 81, then (x,y) equals: A. (1,2) B. (2,1) C. (1 ,1) D. (2,2) E. (1,3) I understand how to cancel out things for the ...

Answer 2

Hey there !

If 3 , y, 81 are in A. P

then y - 3 = 81 - y

y + y = 81 + 3

2y = 84

y = 42

Here, We equated the common differences.

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