Q. For the following equation, find dxdy.y=3x5+9x4−7x3+3xAnswer: dxdy=
Apply Power Rule: To find the derivative of the function y with respect to x, we will apply the power rule to each term individually. The power rule states that the derivative of xn with respect to x is n⋅x(n−1).
Derivative of 3x5: First, we find the derivative of the term 3x5. Using the power rule, we get:dxdy(3x5)=3×5×x5−1=15x4.
Derivative of 9x4: Next, we find the derivative of the term 9x4. Using the power rule, we get:dxdy(9x4)=9⋅4⋅x4−1=36x3.
Derivative of −7x3: Then, we find the derivative of the term −7x3. Using the power rule, we get:dxdy(−7x3)=−7×3×x3−1=−21x2.
Derivative of 3x: Finally, we find the derivative of the term 3x. Since this is a linear term, its derivative is simply the coefficient of x: rac{dy}{dx}(3x) = 3.
Combine Derivatives: Now, we combine all the derivatives we found to get the derivative of the entire function y: dxdy=15x4+36x3−21x2+3.
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