Please help me solve the following problem. Find the local linear approximation L to the specified function f at the designated point P(4,3).

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Question

Please help me solve the following problem.  Find the local linear approximation L to the specified function f at the designated point P(4,3).

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babyslapmafro · Answer

$$f(x,y)=\frac{ 1 }{ \sqrt{x ^{2}+y ^{2}} }$$

anonymous · Answer

alright if you don't mind me giving a shot at it i have not gone into calcu. yet we are trying to find the tangent of the point (4,3) but with the given function f(x,y) we can find it tangent at x = a and i think that the equation for the tangent line is $$L(x) = f(a) + f \prime (a)(x - a)$$ does this sound closely right.