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1) which of the following is a linear approximation of the function f(x)= sqrt[ 4 ]...

1) which of the following is a linear approximation of the function f(x)= sqrt[ 4 ] { x } at a=16.
2) determine the number of inflection points on the graph of the function f(x)=x^5-x^4.
3) determine the sum of the critical numbers for the function f(x)=x^3+3x^2-9x.

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