Hva er ddt[x(t)]\displaystyle \frac{d}{dt}[\sqrt{x(t)}]dtd[x(t)]?
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ddt[x]=12x⋅xt=xt2x\displaystyle \frac{d}{dt}[\sqrt{x}] = \frac{1}{2\sqrt{x}} \cdot x_t = \frac{x_t}{2\sqrt{x}}dtd[x]=2x1⋅xt=2xxt.
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