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calculus

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Let f be the function given by f(x)= x^2+4x-8. The tangent line to the graph at x=2 is used to approximate values of f. For what value(s) of x is the tangent line approximation twice that of f?

  • calculus - ,

    2X+4
    2(2)+4
    4+4
    F(2)=8

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