Sumali sa IDNStudy.com at makuha ang mabilis at kaugnay na mga sagot. Alamin ang mga maaasahang sagot sa iyong mga tanong mula sa aming malawak na kaalaman sa mga eksperto.

ANALYTIC GEOMETRY (Conic Section; Parabola)

Find the equation of the line tangent to y^2=-16x and parallel to x+y=1.




Sagot :

m = -1 since it is parallel to the given line. Since the equation for the slope of the tangent line its derivative, then dy/dx = m = -1

dy/dx = -8/y = -1
y = 8
Substituting y to the eq of parabola, we will get x = -4

The tangent line passes through point (-4, 8)
 
Using point-slope formula, we have
y-8 = -1(x+4)

Therefore, the equation of the tangent line is y = -x + 4