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The equation X-2 (root sign x) - A-1 = 0, has real roots in X ∈ (0,9), and finds the range of A
A:
x-2√x-a-1=0
(√x)²-2√x=a+1
(√x)²-2√x+1=a+2
(√x-1)²=a+2
0
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