Question

How do you simplify `78^-1`?

Answer 1

`78^(-1)=1/78`

Explanation:

Use the negative exponent rule: `a^(-n)=1/(a^n)`, in which negative exponents in the numerator are moved to the denominator and become positive, and negative exponents in the denominator are moved to the numerator and become positive.

`a^(-n)` is understood to be `(a^(-n))/1`, and `78^(-1)` is understood to be `78^(-1)/1`, and `1/78` is understood to be `1/(78^1)` .

http://www.mesacc.edu/~scotz47781/mat120/notes/exponents/review/review.html