Question

Persamaan garis singgung elips 3x^ + 4y^ - 6x + 8y - 45 = 0
di titik (-3, -2) adalah...
a. 3x + y + 11 = 0
b. 3x -y + 7 + 0
c. 3x - 2y + 5 = 0
d. x + 3y + 9 = 0
e. x - 3y - 3 = 0


tolong segera dibantu yaa...

Answer 1

Answer 2

3x²+4x²-6x+8y-45=0 , (-3,-2)
menggunakn cara cepat:
3x1x +4y1y -3(x1+x) +4(y1+y) -45 = 0
3(-3)x +4(-2)y - 3(-3+x) +4(-2+y)-45 =0
-9x -8y+9 - 3x -8+4y-45 =0
-9x-3x -8y +4y +9-8-45 = 0
-12x-4y -44 = 0  :4
-3x - y -11 =0
=3x +y +11 = 0 (a)