Discussion

Explanation:

The fastest way to solve this sum is by substituting the values of x and y from the options.

For x = 5 and y = 2, the first equation becomes

2^0.7x × 3^−1.25y  = 2^{0.7× 5} × 3^{−1.25 × 2}

              = 2^7/2 × 3^−5/2

             = $\frac{8\sqrt{6}}{27}$

These values of x and y satisfy the second equation also.

Hence, option (e).

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