$\frac{d}{d x}\left(\frac{2^x+3^x}{4^x}\right) = $ . . . . . .

  • A
    $\left(\frac{1}{2}\right)^x \log \frac{1}{2} + \left(\frac{3}{2}\right)^x \log \frac{3}{4}$
  • B
    $\left(\frac{1}{2}\right)^x \log \frac{1}{2} + \left(\frac{3}{4}\right)^x \log \frac{3}{4}$
  • C
    $\left(\frac{1}{2}\right)^x \log \frac{1}{2} - \left(\frac{3}{4}\right)^x \log \frac{3}{4}$
  • D
    $\left(\frac{1}{2}\right)^x \log \frac{1}{2} - \left(\frac{3}{4}\right)^x \log \frac{3}{2}$

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