any constant 1 , 0 , 2 , pi , square root its derivative = 0
so
dy/dx x^2+y^2= sqrt(5)
2 x x' + 2 y y' = 0 [x' = 1]
2x + 2yy'=0 ] /2
x + yy' = 0
y' = - x/y
Find dy/dx if x^2+y^2= /5
*(/5= square root of 5)*
1 answer