यदि 3^(x-2y)=27, 7^(3x+y)=1/49तो...

यदि ` 3^(x-2y)=27, 7^(3x+y)=1/49`तो

A

`x = - 1//7, y = - 11//7`

B

`x = 3 , y = - 2`

C

`x = 5//7 , y = - 8//7`

D

उपरोक्त में से कोई नहीं

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The correct Answer is:

A

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