zadanie w załaczniku daje najjjjjjjjj
x²≥ 9
x²-9≥0
licze pierwiastki:
(x-3)(x+3)=0
x=3 ∨ x=-3
+ + + + + +
-----*------*-------->
-3 - - 3
x∈(-∞ , -3> ∨ < 3 , +∞)
x²-4x+4 >0
(x-2)²>0
x-2=0
x=2
x∈R\{2}
-x² ≥ 7
-x² -7 ≥ 0 /;(-1)
x² +7 ≤ 0
sprzeczne
x∈Ф
-2(x+3)(4-x)≤0 /:(-2)
(x+3)(4-x) ≥ 0
x=-3 ∨ x=4
+ + +
------*------*------->
- - -3 4 - - -
x∈<-3 ,4 >
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x²≥ 9
x²-9≥0
licze pierwiastki:
(x-3)(x+3)=0
x=3 ∨ x=-3
+ + + + + +
-----*------*-------->
-3 - - 3
x∈(-∞ , -3> ∨ < 3 , +∞)
x²-4x+4 >0
(x-2)²>0
x-2=0
x=2
x∈R\{2}
-x² ≥ 7
-x² -7 ≥ 0 /;(-1)
x² +7 ≤ 0
sprzeczne
x∈Ф
-2(x+3)(4-x)≤0 /:(-2)
(x+3)(4-x) ≥ 0
x=-3 ∨ x=4
+ + +
------*------*------->
- - -3 4 - - -
x∈<-3 ,4 >