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Liindsay
@Liindsay
April 2019
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Resoudre les inequations suivantes :
a. x² ≥ 16
b. 4 ≤ x² ≤ 25
c. x² < 7
d. -3x² + 1 ≤ -11
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Resoudre les inequations suivantes :
a. x² ≥ 16
x²-16 >=0
(x-4)(x+4) >=0
S=]-inf;-4] U [4;+inf[
b. 4 ≤ x² ≤ 25
S=[-5;-2] U [2;5]
c. x² < 7
S=]-V7;V7[
d. -3x² + 1 ≤ -11
-3x²-12 <=0
x²+4 >=0
S=IR
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a. x² ≥ 16
x²-16 >=0
(x-4)(x+4) >=0
S=]-inf;-4] U [4;+inf[
b. 4 ≤ x² ≤ 25
S=[-5;-2] U [2;5]
c. x² < 7
S=]-V7;V7[
d. -3x² + 1 ≤ -11
-3x²-12 <=0
x²+4 >=0
S=IR