Sagot :
7 × (7 exposant-2) exposant-4 7x7 exposant 8 7 exposant 9
-------------------------------------- = ----------------------- = ------------------------ = 7 exposant -2
7 exposant 11 7 exposant 11 7 exposant 11
=1/7²
-------------------------------------- = ----------------------- = ------------------------ = 7 exposant -2
7 exposant 11 7 exposant 11 7 exposant 11
=1/7²