limx→∞(1+1x)7x=\lim\limits_{x \to \infty}(1 + \dfrac{1}{x})^{7x} =x→∞lim(1+x1)7x=( ).
(A)e7e^7e7
(B)e−7e^{-7}e−7
(C)1
(D)∞\infty∞
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