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olenka2114
@olenka2114
July 2022
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решите пожалуйста срочно нужно
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sangers1959
Verified answer
1) x=(6x+35)/(x+8)
x²+8x=6x+35
x²+2x-35=0 D=144
x₁=-7 x₂=5
2) 3x/4=2_1/4
3x/4=9/4
x=3
3) 2^(7-2x)=8^x
2^(7-2x)=2^(3x)
7-2x=3x
5x=7
x=1,2.
4) x²-8=(x-2)²
x²-8=x²-4x+4
4x=12
x=3
5) x²-5x+6≤0 D=1
x₁=3 x₂=2
(x-3)(x-2)≤0
-∞____+____2____-____3____+_____+∞
x∈[2;3].
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olenka2114
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Answers & Comments
Verified answer
1) x=(6x+35)/(x+8)x²+8x=6x+35
x²+2x-35=0 D=144
x₁=-7 x₂=5
2) 3x/4=2_1/4
3x/4=9/4
x=3
3) 2^(7-2x)=8^x
2^(7-2x)=2^(3x)
7-2x=3x
5x=7
x=1,2.
4) x²-8=(x-2)²
x²-8=x²-4x+4
4x=12
x=3
5) x²-5x+6≤0 D=1
x₁=3 x₂=2
(x-3)(x-2)≤0
-∞____+____2____-____3____+_____+∞
x∈[2;3].