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Yana11991199
@Yana11991199
March 2022
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в скобках 2 и 4............
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sedinalana
Verified answer
1
(2x-1)(2x+1)/(x+3)<0
x=1/2 x=-1/2 x=-3
_ + _ +
-------------------(-3)------------(-1/2)---------(1/2)--------------------
x∈(-∞;-3) U (-1/2;1/2)
2
(4-2^(3-x))/(x-1)(x+1)≥0
4-2^(3-x)=0⇒2^(3-x)=4⇒3-x=2⇒x=1
x-1=0⇒x=1
x+1=0⇒x=-1
_ _ +
------------(-1)-----------------(1)-----------------------
+ _ +
x∈(1;1) U (1;∞)
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Verified answer
1(2x-1)(2x+1)/(x+3)<0
x=1/2 x=-1/2 x=-3
_ + _ +
-------------------(-3)------------(-1/2)---------(1/2)--------------------
x∈(-∞;-3) U (-1/2;1/2)
2
(4-2^(3-x))/(x-1)(x+1)≥0
4-2^(3-x)=0⇒2^(3-x)=4⇒3-x=2⇒x=1
x-1=0⇒x=1
x+1=0⇒x=-1
_ _ +
------------(-1)-----------------(1)-----------------------
+ _ +
x∈(1;1) U (1;∞)