Réponse :
bonsoir
u (x) = ( 4 x - 6 )²
u ( 3) = ( 12 - 6 )² = 6 ² = 36
w ( x) = ( 6 x - 9 ) / ( 2 x - 7 )
w ( 2/7 ) = ( 12/7 - 9 ) ( 4/7 - 7 )
= ( 12/7 - 63/7 ) ( 4/7 - 49/7 ) = - 51/7 * - 45/7 = 2 397/49
v( x) = - ( 4 - 5 x ) = - 4 + 5 x
- 4 + 5 x = 3
5 x = 3 + 4
5 x = 7
x = 7/5
( 6 x - 9 ) / ( 2 x - 7 ) = 0
x = 3/2 ou 7 /2
M de C u
( 4 x - 6 )²
( - 8 - 6 )² = - 14 ² = 196
u ( - 2 ) = 196
w ( 2) = ( 12 - 9 ) / 14 - 7 ) = 3 /7 donc P ∉ Cw
Explications étape par étape
*u(x)=(4x-6)²
*v(x)=-(4-5x)
*w(x)=(6x-9)/(2x-7)
1)
a. u(3)=[(4*3)-6]² = (12-6)² = 6² = 36
b. w(7/2)= [(6*7/2)-9] / ([(2*7/2) - 7] = (42/2 - 9)/(14/2) - 7 = (21-9)/(7-7)= 12/0 = 12
2)
a. v(x) =3
-4 + 5x = 3
5x = 3+4 = 7
b. w(x) = 0
(6x - 9)/(2x - 7) = 0
*6x - 9 = 0 6x = 9 x = 9/6 = (3*3)/(3*2) = 3/2
*2x - 7 = 0 2x = 7 x = 7/2
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Réponse :
bonsoir
u (x) = ( 4 x - 6 )²
u ( 3) = ( 12 - 6 )² = 6 ² = 36
w ( x) = ( 6 x - 9 ) / ( 2 x - 7 )
w ( 2/7 ) = ( 12/7 - 9 ) ( 4/7 - 7 )
= ( 12/7 - 63/7 ) ( 4/7 - 49/7 ) = - 51/7 * - 45/7 = 2 397/49
v( x) = - ( 4 - 5 x ) = - 4 + 5 x
- 4 + 5 x = 3
5 x = 3 + 4
5 x = 7
x = 7/5
( 6 x - 9 ) / ( 2 x - 7 ) = 0
x = 3/2 ou 7 /2
M de C u
( 4 x - 6 )²
( - 8 - 6 )² = - 14 ² = 196
u ( - 2 ) = 196
w ( 2) = ( 12 - 9 ) / 14 - 7 ) = 3 /7 donc P ∉ Cw
Explications étape par étape
Réponse :
*u(x)=(4x-6)²
*v(x)=-(4-5x)
*w(x)=(6x-9)/(2x-7)
1)
a. u(3)=[(4*3)-6]² = (12-6)² = 6² = 36
b. w(7/2)= [(6*7/2)-9] / ([(2*7/2) - 7] = (42/2 - 9)/(14/2) - 7 = (21-9)/(7-7)= 12/0 = 12
2)
a. v(x) =3
-4 + 5x = 3
5x = 3+4 = 7
x = 7/5
b. w(x) = 0
(6x - 9)/(2x - 7) = 0
*6x - 9 = 0 6x = 9 x = 9/6 = (3*3)/(3*2) = 3/2
*2x - 7 = 0 2x = 7 x = 7/2
Explications étape par étape