divide and simplifyr
r^-7/r^-3=
divide and write expression using positivr exponent.
Subtract exp. in denominator from exp. in numerator: -7-(-3) = -7+3 = -4.
r^-7 / r^-3 = r^-4 = 1/r^4.
r^-7/r^-3=
divide and write expression using positivr exponent.
r^-7 / r^-3 = r^-4 = 1/r^4.