Q. Given the function y=3−2x22+3x, find dxdy in simplified form.Answer: dxdy=
Apply Quotient Rule: To find the derivative of the function y=3−2x22+3x 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)=2+3x and v(x)=3−2x2.
Find u(x) Derivative: First, we need to find the derivative of u(x)=2+3x with respect to x. The derivative of a constant is 0, and the derivative of 3x with respect to x is 3. Therefore, u′(x)=0+3=3.
Find v(x) Derivative: Next, we need to find the derivative of v(x)=3−2x2 with respect to x. The derivative of a constant is 0, and the derivative of −2x2 with respect to x is −4x. Therefore, v′(x)=0−4x=−4x.
Apply Quotient Rule: Now we apply the quotient rule. We have u(x)=2+3x, v(x)=3−2x2, u′(x)=3, and v′(x)=−4x. Plugging these into the quotient rule formula, we get:dxdy=(3−2x2)2(3−2x2)⋅3−(2+3x)⋅(−4x).
Simplify Numerator: Simplify the expression in the numerator:(3−2x2)×3−(2+3x)×(−4x)=9−6x2+8x+12x2.
Combine Like Terms: Combine like terms in the numerator:9−6x2+8x+12x2=9+8x+6x2.
Final Derivative: Now we have the simplified form of the derivative:(dxdy=(3−2x2)29+8x+6x2).
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