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xxxx⋯543 \large \sqrt{ x \sqrt[3]{x \sqrt[4]{x \sqrt[5]{ x \cdots }} }} x3x4x5x⋯
Let e=2+11×2+11×2×3+11×2×3×4+⋯ e = 2 + \dfrac1{1\times2} + \dfrac1{1\times2\times3}+ \dfrac1{1\times2\times3\times4} + \cdots e=2+1×21+1×2×31+1×2×3×41+⋯.
Which of the following is equal to the expression above. (Take x⩾0x\geqslant 0 x⩾0)
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