Q. Find the derivative of the following function.y=2−x2Answer: y′=
Identify function components: Identify the function and its components.We have y=2−x2, which is an exponential function with a negative quadratic exponent.
Apply chain rule: Apply the chain rule for differentiation.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 2u and the inner function is u=−x2.
Differentiate outer function: Differentiate the outer function with respect to u. The derivative of 2u with respect to u is (2u⋅ln(2)), where ln(2) is the natural logarithm of 2.
Differentiate inner function: Differentiate the inner function with respect to x. The derivative of −x2 with respect to x is −2x.
Apply chain rule with derivatives: Apply the chain rule using the derivatives from steps 3 and 4.y′=dxd[2−x2]=(2−x2⋅ln(2))⋅(−2x)
Simplify derivative expression: Simplify the expression for the derivative.y′=−2x⋅2−x2⋅ln(2)This is the derivative of the function y with respect to x.
More problems from Find derivatives of radical functions