Q. Given the function y=5x−11+x4, find dxdy in simplified form.Answer: dxdy=
Apply Quotient Rule: To find the derivative of the function y=5x−11+x4 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)=1+x4 and v(x)=5x−1.
Find u(x): First, we need to find the derivative of u(x)=1+x4 with respect to x. The derivative of a constant is 0, and the derivative of x4 with respect to x is 4x3. Therefore, u′(x)=0+4x3=4x3.
Find v(x): Next, we need to find the derivative of v(x)=5x−1 with respect to x. The derivative of 5x with respect to x is 5, and the derivative of a constant is 0. Therefore, v′(x)=5−0=5.
Plug into Quotient Rule: Now we apply the quotient rule. We have u(x)=1+x4, v(x)=5x−1, u′(x)=4x3, and v′(x)=5. Plugging these into the quotient rule formula, we get:dxdy=(5x−1)2(5x−1)⋅(4x3)−(1+x4)⋅(5).
Simplify Numerator: We simplify the numerator of the derivative:(5x−1)×(4x3)−(1+x4)×(5)=20x4−4x3−5−5x4.
Combine Like Terms: Combine like terms in the numerator:20x4−4x3−5−5x4=15x4−4x3−5.
Final Derivative: Now we have the simplified form of the derivative:(dxdy=(5x−1)215x4−4x3−5).
More problems from Simplify variable expressions using properties