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If f(x)=sqrt 23x, find f'(x)
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High School Teacher
Express the square root as exponent.
To take the derivative of f(x), apply formula which is `(u^n)' = n*u^(n-1)* u'` .
`f'(x)=1/2*(23x)^(1/2 - 1)*(23x)' = 1/2*(23x)^(-1/2)*23 = (23(23x)^(-1/2))/2`
Apply, the negative property of exponent which is a^(-m)=1/a^m.
Then, express the fractional exponent as radical.
Hence, the derivative of the given function is `f'(x)=23/(2sqrt(23x))` .
Posted by mjripalda on February 1, 2013 at 3:43 AM (Answer #1)
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