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Answers for “上限的导数是什么?”

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The derivative of the upper limit u=tu=\sqrt{t} with respect to tt is 1/(2t)1/(2\sqrt{t}). This factor is used in the chain rule when differentiating an integral with this variable upper limit.

Conditions: t>0t > 0.; The upper limit is defined as u=tu=\sqrt{t}.

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The simplified derivative is sin⁡(t5/2)/(2t5/2)\sin(t^{5/2})/(2t^{5/2}). This is obtained by evaluating the integrand at x=tx=\sqrt{t} and multiplying by the derivative of the upper limit, 1/(2t)1/(2\sqrt{t}).

Conditions: The integrand is sin⁡(x5)/x4\sin(x^5)/x^4.; The lower limit is the constant 2.; The upper limit is t\sqrt{t}.; t>0t > 0.

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The net-change formula states that for a continuously differentiable function on an interval, integrating its derivative gives the endpoint difference. Specifically, the integral of the derivative f′f' from aa to bb equals f(b)−f(a)f(b) - f(a).

Conditions: The function is continuously differentiable on the interval.; The integration is over the interval from aa to bb.