Q. For the following equation, find dxdy.y=4x5+4x−7Answer: dxdy=
Identify function: Identify the function to differentiate.We are given the function y=4x5+4x−7 and we need to find its derivative with respect to x, which is denoted as dxdy.
Apply power rule: Apply the power rule to each term.The power rule states that the derivative of xn with respect to x is n∗x(n−1). We will apply this rule to each term in the function separately.
Differentiate first term: Differentiate the first term 4x5. Using the power rule, the derivative of 4x5 with respect to x is 5⋅4x5−1=20x4.
Differentiate second term: Differentiate the second term 4x. The derivative of 4x with respect to x is 4, since the power of x is 1 and 1×4x1−1=4×1=4.
Differentiate constant term: Differentiate the constant term −7. The derivative of a constant is 0, so the derivative of −7 with respect to x is 0.
Combine derivatives: Combine the derivatives of all terms to find dxdy.dxdy=20x4+4+0 Simplify the expression by removing the 0.dxdy=20x4+4
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