Q. Find the derivative of the following function.y=58x2Answer: y′=
Identify Components: Identify the components of the function.The function y=58x2 is an exponential function where the base is a constant (5) and the exponent is a function of x (8x2).
Apply Chain Rule: Apply the chain rule for derivatives.The chain rule states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function. In this case, the outer function is 5u and the inner function is u=8x2.
Find Derivative Outer: Find the derivative of the outer function with respect to u. The derivative of au with respect to u, where a is a constant, is au⋅ln(a). Therefore, the derivative of 5u with respect to u is 5u⋅ln(5).
Find Derivative Inner: Find the derivative of the inner function with respect to x. The inner function is u=8x2. The derivative of 8x2 with respect to x is 16x, since dxd(x2)=2x and we have a constant multiple of 8.
Apply Chain Rule: Apply the chain rule using the derivatives from steps 3 and 4.The derivative of y with respect to x is the derivative of the outer function evaluated at the inner function times the derivative of the inner function. This gives us y′=(58x2⋅ln(5))⋅(16x).
Simplify Derivative: Simplify the expression for the derivative.y′=16x⋅58x2⋅ln(5). This is the simplified form of the derivative of the given function.
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