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  4. If y=2( log)2 (x)2 x+( tan ⁡ (π x/4))(4/π x) , then the value of (d y/d x) at x=1 is

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Q. If $y=2^{\left(\log\right)_{2} \left(x\right)^{2 x}}+\left(\tan ⁡ \frac{\pi x}{4}\right)^{\frac{4}{\pi x}}$ , then the value of $\frac{d y}{d x}$ at $x=1$ is

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Solution:

Correct answer is '4'