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Asked by kevin

find the equation of a tangent line of

x^(1/4) + y^(1/4) = 4 at the point (16,16)
14 years ago

Answers

Answered by MathMate
Use implicit differentiation to find y'.
x^(1/4)+y^(1/4)=4
differentiate with respect to x:
x^(-3/4)+y^(-3/4)*dy/dx=0

dy/dx
= -x^(-3/4)*y(3/4)
= -x^(-3/4)*(4-x^(1/4))^3
For x=16,
dy/dx = -1

Find the line that passes through (16,16) with a slope of dy/dx = -1.
14 years ago

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