IMPLICIT DIFFERENTIATION
A function is in the form f(x, y) = 0 is called implicit function.
For example x2 + 2xy = 0, where y is directly defined as a function of x.
In case of implicit functions, if y be a differentiable function of x, no attempt is required to express y as an explicit function of x for finding out ᵈʸ⁄dₓ. In such case differentiation of both sides with respect to x and solve for ᵈʸ⁄dₓ.
In each case, find ᵈʸ⁄dₓ.
Example 1 :
x2 + y2 = 25
Solution :
x2 + y2 = 25
Differentiate both sides with respect to x.
Example 2 :
4x3y2 + 3x = 1
Solution :
4x3y2 + 3x = 1
Differentiate both sides with respect to x.
Example 3 :
x2y2 + 3xy + y = 0
Solution :
x2y2 + 3xy + y = 0
Differentiate both sides with respect to x.
Example 4 :
sin(x2+ y2) = ey
Solution :
sin(x2+ y2) = ey
Differentiate both sides with respect to x.
Example 5 :
ln(x2+ y2) = 3x
Solution :
ln(x2+ y2) = 3x
Differentiate both sides with respect to x.
Example 6 :
esiny = 2xy + 5
Solution :
esiny = 2xy + 5
Differentiate both sides with respect to x.
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