erfan1234567
If
f(x) = 3 sin x + ln(4x), find f '(x).
f '(x) =



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RolyPoly
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f(x) = 3 sin x + ln(4x)
f'(x) = d/dx (3 sin x) + d/dx (ln(4x))
d/dx sinx = cosx
d/dx lnx = 1/x
Can you do it now?

erfan1234567
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3cosx+....

erfan1234567
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:(

RolyPoly
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d/dx ln(ax) = (1/ax) (a) = ...

erfan1234567
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3cosx+1/x right??

RolyPoly
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It should be!

RolyPoly
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I meant it is correct.

erfan1234567
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thanks