Answer to Question #276005 in Calculus for Annah

Question #276005

Find an equation of the tangent line to the curve x⁴ + 2y⁴ = 33 at the point (1,2).

1
Expert's answer
2021-12-06T16:43:41-0500
x4+2y4=33x^4+2y^4=33

Differentiate both sides with respect to xx


4x3+8y3y=04x^3+8y^3y'=0

y=x32y3y'=-\dfrac{x^3}{2y^3}

Point (1,2)

slope=m=132(23)=116slope=m=-\dfrac{1^3}{2(2^3)}=-\dfrac{1}{16}

The equation of the tangent line in point-slope form


y2=116(x1)y-2=-\dfrac{1}{16}(x-1)

The equation of the tangent line in slope-intercept form


y=116x+3316y=-\dfrac{1}{16}x+\dfrac{33}{16}


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