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2011年12月22日 · 2的0.25次方就是四次根号（2），也就是根号（根号2），约等于1.189207115

Enter values into any two of the input fields to solve for the third. What is an exponent? Exponentiation is a mathematical operation, written as an, involving the base a and an exponent n. In the case where n is a positive integer, exponentiation corresponds to repeated multiplication of the base, n times.

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2的0.25次方就是四次根号（2）,也就是根号（根号2）,约等于1.189207115

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2的平方是4,所以2的负二次方是四分之一,即0.25