Find the equation of the tangent to the ellipse x216+y29=1\frac{x^2}{16} + \frac{y^2}{9} = 116x2+9y2=1 at the point (4,0)(4, 0)(4,0).
x=−4x = -4x=−4
y=0y = 0y=0
x=4x = 4x=4
x+y=4x + y = 4x+y=4