Sagot :
Bonjour,
a. k(8) = 2 × 8 - 7 = 16 - 7 = 9
b. 2x - 7 = -9 <=> 2x = -9 + 7 <=> 2x = -2 <=> x = -2/2 = -1
Ce nombre est donc -1
Bonjour,
a. k(8) = 2 × 8 - 7 = 16 - 7 = 9
b. 2x - 7 = -9 <=> 2x = -9 + 7 <=> 2x = -2 <=> x = -2/2 = -1
Ce nombre est donc -1