Given the function y=−35x42, find dxdy. Express your answer in radical form without using negative exponents, simplifying all fractions.Answer: dxdy=
Q. Given the function y=−35x42, find dxdy. Express your answer in radical form without using negative exponents, simplifying all fractions.Answer: dxdy=
Rewrite Function: We are given the function y=−35x42. To find the derivative dxdy, we will use the power rule for differentiation, which states that if y=axn, then dxdy=n⋅axn−1. In this case, we have a constant multiplied by x raised to a power, so we will apply the power rule accordingly.
Apply Power Rule: First, let's rewrite the function to make it easier to differentiate. We can express the cube root of 5 as 51/3 and the variable x to the power of 4 as x4. So the function becomes y=−3⋅51/3⋅x42. Now, we can treat 3⋅51/3 as a constant coefficient and x4 as the variable term.
Differentiate Variable Term: Applying the power rule, we differentiate the variable term x4. The derivative of x4 with respect to x is 4⋅x4−1=4⋅x3. We will multiply this by the constant coefficient −3⋅51/32.
Simplify Constants: The derivative of y with respect to x is then dxdy=−3⋅5312⋅4x3. We can simplify this by multiplying the constants together.
Express Derivative: Multiplying the constants gives us (dy)/(dx)=−(3⋅51/32⋅4)⋅x3=−(3⋅51/38)⋅x3. This is the derivative in terms of x, but we need to express it without using negative exponents.
Check for Negative Exponents: Since there are no negative exponents in our expression, we do not need to make any further adjustments to the form of the derivative. The expression is already simplified, and the fraction is as simplified as it can be without a decimal approximation of the cube root of 5.
Final Derivative: Therefore, the derivative of the function y=−35x42 with respect to x is dxdy=−(3⋅51/38)⋅x3. This is the final answer in radical form, with all fractions simplified and no negative exponents.
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