bonsoir
je ne les fais pas toutes, je te montre
( x/3 + 1 ) / ( - x /4 + 2/5) ≥ 0
x/3 + 1 = 0 ⇔ x/3 = - 1 ⇔ x = - 3
- x /4 + 2/5 = 0 ⇔ - x /4 = - 2/5 ⇔ x = - 8/5 = valeur interdite
x - ∞ - 3 - 8/5 + ∞
x/3 + 1 - 0 + +
- x/4 + 2/5 + + ║ -
( x/3 + 1)
- x/4 + 2/5 - + -
S [ - 3 ; - 8/5 [
( 2 x + 3 ) ( - x + 4) / ( x - 2) < 0
2 x + 3 = 0 ⇔ 2 x = - 3 ⇔ x = - 3/2
- x + 4 = 0 ⇔ - x = - 4 ⇔ x = 4
x - 2 = 0 ⇔ x = 2 = valeur interdite
x - ∞ - 3/2 2 4 + ∞
2 x - 3 - Ф + + +
- x + 4 + + + Ф -
x - 2 - - ║ + +
( 2 x + 3 ) ( - x + 4)
x - 2 + - + -
S ] - 3/2 ; 2 [ ∪ ] 4 ; + ∞ [
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bonsoir
je ne les fais pas toutes, je te montre
( x/3 + 1 ) / ( - x /4 + 2/5) ≥ 0
x/3 + 1 = 0 ⇔ x/3 = - 1 ⇔ x = - 3
- x /4 + 2/5 = 0 ⇔ - x /4 = - 2/5 ⇔ x = - 8/5 = valeur interdite
x - ∞ - 3 - 8/5 + ∞
x/3 + 1 - 0 + +
- x/4 + 2/5 + + ║ -
( x/3 + 1)
- x/4 + 2/5 - + -
S [ - 3 ; - 8/5 [
( 2 x + 3 ) ( - x + 4) / ( x - 2) < 0
2 x + 3 = 0 ⇔ 2 x = - 3 ⇔ x = - 3/2
- x + 4 = 0 ⇔ - x = - 4 ⇔ x = 4
x - 2 = 0 ⇔ x = 2 = valeur interdite
x - ∞ - 3/2 2 4 + ∞
2 x - 3 - Ф + + +
- x + 4 + + + Ф -
x - 2 - - ║ + +
( 2 x + 3 ) ( - x + 4)
x - 2 + - + -
S ] - 3/2 ; 2 [ ∪ ] 4 ; + ∞ [