f(t)=lim x→无穷大 [t(1+1/x)^2tx] 求f'(t)
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f(t)=limx→无穷大[t(1+1/x)^2tx]求f''(t)f(t)=limx→无穷大[t(1+1/x)^2tx]求f''(t)f(t)=limx→无穷大[t(1+1/x)^2tx]求f''(t)l
f(t)=lim x→无穷大 [t(1+1/x)^2tx] 求f'(t)
f(t)=lim x→无穷大 [t(1+1/x)^2tx] 求f'(t)
f(t)=lim x→无穷大 [t(1+1/x)^2tx] 求f'(t)
lim x→无穷大(1+1/x)^2tx=[lim x→无穷大(1+1/x)^x]^2t=e^(2t)
f(t)=te^(2t)
f'(t)=e^(2t)+2te^(2t)
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