Can anyone find the tangent line approximation for f(x)=x^4+3x^2, when
a =-1?

Can anyone find the tangent line approximation for f(x)=x^4+3x^2, when
a =-1?

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f '(x)=4x^3+6x did you get this far?

ok i know how you got there

f '(1)=4+6=10

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