Calculus
posted by sh .
Find the linear approximation L(x) of the given function at a, and use it to approximate the function value at the given xvalue.
f(x)=x^(1/3), a=27, x=28
I found the derivative to be
f'(x)= 1/[3(27)^(2/3)]
but it does not exist because a number cannot be negative in a root.
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