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Every number can be expressed using an exponent. You select a base, b, which should be a positive real number. Suppose the number is x.

If this number is negative, then its exponent form will have a negative sign before it.

The absolute value of the number is converted to the exponent form by solving x = b^y where y is the exponent. However, you need to know about logarithms before you can do that (and this question suggests that you have not yet progressed to that level of mathematics).

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8y ago
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Q: Is a number that can be expressed using an exponent?
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