设f(t)=lim[x→∞] t [(x+t)/(x-t)]^x ,则f'(t)=________.
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设f(t)=lim[x→∞]t[(x+t)/(x-t)]^x,则f''(t)=________.设f(t)=lim[x→∞]t[(x+t)/(x-t)]^x,则f''(t)=________.设f(t)=
设f(t)=lim[x→∞] t [(x+t)/(x-t)]^x ,则f'(t)=________.
设f(t)=lim[x→∞] t [(x+t)/(x-t)]^x ,则f'(t)=________.
设f(t)=lim[x→∞] t [(x+t)/(x-t)]^x ,则f'(t)=________.
运用重要极限变形
设f(t)=lim[x→∞] t [(x+t)/(x-t)]^x ,则f'(t)=________.
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