1.

यदि `2^(2x-y=)12` और `2^(x+y)=32` है `xy` का मान ज्ञात करें?A. 2B. 4C. 6D. 8

Answer» Correct Answer - C
`2^(2x-y)=16` (given)
`implies2^(2x-y)=2^(4)`
`:. 2x-y=4` ………..i
`2^(x+y)=32` (given)
`2^(x+y)=2^(5)`
and `x+y=5` ………….ii
by equation i and ii
`2x-y=4`
`(x+y=5)/(3x=9)`
`x=3`
`:. y=2, xy=3xx2=6`


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