If $f(x) = 3x(\sin x + \cos x)$, find $f'(x) = $ $f'(5) = $
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Step 1: To find f'(x), we need to use the product rule, which states that if f(x) = u(x)v(x), then f'(x) = u'(x)v(x) + u(x)v'(x). Show more…
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