Q. For the following equation, find dxdy.y=−5x3+7x+6Answer: dxdy=
Given Function: Given the function y=−5x3+7x+6, we need to find the derivative of y with respect to x, denoted as dxdy. To do this, we will use the power rule for differentiation, which states that the derivative of xn with respect to x is n⋅xn−1.
Differentiate −5x3: First, we differentiate the term −5x3. Using the power rule, the derivative of −5x3 with respect to x is −5×3x3−1=−15x2.
Differentiate 7x: Next, we differentiate the term 7x. The derivative of 7x with respect to x is 7, since the power of x is 1 and 1×x1−1=1×x0=1.
Differentiate Constant: Finally, we differentiate the constant term 6. The derivative of a constant with respect to x is 0, because constants do not change as x changes.
Combine Derivatives: Combining the derivatives of all terms, we get dxdy=−15x2+7+0.
Simplify Final Derivative: Simplifying the expression, we see that the +0 is unnecessary and can be omitted. Therefore, the final simplified form of the derivative is dxdy=−15x2+7.
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