Continuity and DifferentiabilityMedium

Question

If 2^x + 2^y = 2^x+y, then is equal to -

Options

A.

B.

C.2^x-y

D.

Solution

2^x + 2^y - 2^{x + y} = 0

= - 2^{x - y}
= 2^x-y

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