Question

Найдите значение выражения ab-1/ab+1 при a=-5 b=0,4

Answer 1

1) ab = 5*0,4 = 2

ab-1/ab+1 = 2 - 1/2 + 1 = 3 - 1/2 = 2.5

(ab-1)/(ab+1) = (2-1)/(2+1) = 1/3

Answer 2

Ab=5*0,4=2
Ab-1/ab+1= 2-1/2+ 1=3-1/2=2,5
(Ab-1):(ab+1)=(2-1)/(2+1) = 1/3