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vikau5
@vikau5
August 2022
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x -√х-1 = 5. x+1 Под корнем, а не только х
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wejde
Verified answer
√(x+1)=x-5/()²
D(y): x+1≥0, x-5≥0
x≥-1, x≥5
x∈[5;+∞)
x+1=x²-10x+25
x²-11x+24=0
D=11²-4*1*24=121-96=25
x=(11+5)/2=8
x=(11-5)/2=3 - посторонний корень
Ответ: х=8
3 votes
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Answers & Comments
Verified answer
√(x+1)=x-5/()²D(y): x+1≥0, x-5≥0
x≥-1, x≥5
x∈[5;+∞)
x+1=x²-10x+25
x²-11x+24=0
D=11²-4*1*24=121-96=25
x=(11+5)/2=8
x=(11-5)/2=3 - посторонний корень
Ответ: х=8