It is the inverse of x to the positive value of that power.
So x-a = 1/xa or (1/x)a
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A negative power just means to invert it. Let's say we had x^(-2) - it is the same thing as 1/(x^2).
To express x to the power of negative 2 as a fraction, you can rewrite it as 1 over x squared. This is because any number raised to a negative exponent is equivalent to its reciprocal raised to the positive exponent. Therefore, x to the power of negative 2 is the same as 1 over x squared.
1.835 x 10 to the negative 4th power in standard notation is 0.0001835
Negative one half to the fourth power equals 0.0625
When a number is raised to a negative exponent, it is equivalent to its reciprocal raised to the positive exponent. Therefore, x to the power of -7 is equal to 1 divided by x to the power of 7, or 1/x^7.