2. 外语
  3. If x is a positive number and 1/2 the square root of x is the cube root of x, then x=

If x is a positive number and 1/2 the square root of x is the cube root of x, then x=

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问题 If x is a positive number and 1/2 the square root of x is the cube root of x, then x=
选项 A、64
B、32
C、16
D、4
E、1
答案A
解析 The fastest approach to a question like this is probably to plug in the answer choices and see which one fits. If x=64, then 1/2 of the square root is 4, which is also the cube root of 64, so A is the answer.
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