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vinipyx228
@vinipyx228
August 2021
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Решите неравенства
-2x^²+x+1≤0
4x²-4x+1≤0
2x²-6x+5<0
6>x²
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карим122
Очень просто!! Решение на фотографии
1 votes
Thanks 1
ПрофиЗнания
1)2x²-x-1≥0
D=1+8=9
x1=(1+3)/2*2=4/4=1
x2=(1-3)/2*2=-2/4=-1/2
(-∞;-1/2]∪[1;+∞)
2) (2x-1)²≤0
2x-1≤0
2x≤1
x≤1/2
(-∞;1/2]
3)
2x²-6x+5<0
D=36-40<0
∅
4)
6>x²
x1=
√6 x2=-√6
(-√6;√6)
1 votes
Thanks 0
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Answers & Comments
D=1+8=9
x1=(1+3)/2*2=4/4=1
x2=(1-3)/2*2=-2/4=-1/2
(-∞;-1/2]∪[1;+∞)
2) (2x-1)²≤0
2x-1≤0
2x≤1
x≤1/2
(-∞;1/2]
3)2x²-6x+5<0
D=36-40<0
∅
4)6>x²
x1= √6 x2=-√6
(-√6;√6)