Q. Given the function y=2−x23x+2, find dxdy in simplified form.Answer: dxdy=
Apply Quotient Rule: To find the derivative of the function y=2−x23x+2 with respect to x, we will use the quotient rule. The quotient rule states that if you have a function that is the quotient of two functions, v(x)u(x), then its derivative is given by (v(x))2v(x)⋅u′(x)−u(x)⋅v′(x). Here, u(x)=3x+2 and v(x)=2−x2.
Find u′(x): First, we need to find the derivative of u(x)=3x+2 with respect to x. The derivative of 3x is 3, and the derivative of a constant is 0, so u′(x)=3.
Find v′(x): Next, we need to find the derivative of v(x)=2−x2 with respect to x. The derivative of 2 is 0, and the derivative of −x2 is −2x, so v′(x)=−2x.
Plug into Quotient Rule: Now we apply the quotient rule. We have u(x)=3x+2, v(x)=2−x2, u′(x)=3, and v′(x)=−2x. Plugging these into the quotient rule formula, we get:dxdy=(2−x2)2(2−x2)⋅3−(3x+2)⋅(−2x).
Simplify Numerator: Simplify the expression in the numerator:(dxdy)=(2−x2)2(6−3x2+6x2+4x).
Combine Like Terms: Combine like terms in the numerator:(dxdy)=(2−x2)2(6+4x+3x2).
Final Derivative: The expression is now simplified, and we have found the derivative of y with respect to x:dxdy=(2−x2)23x2+4x+6.
More problems from Simplify variable expressions using properties