jika 7pamgkat8=1per7dalam kurung pangkat p+5, tentulan nilai p

[tex] {7}^{8} = {( \frac{1}{7} )}^{p + 5} \\ {7}^{8} = {7}^{ - p - 5} \\ 8 = - p - 5 \\ p = - 13[/tex]