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19 Dec 2007, 13:31
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N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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How many roots does the following equation have?
sqrt(x^2 + 1) + sqrt(x^2 + 2) = 2
a) 0
b) 1
c) 2
d) 3
e) 4
sqrt(x^2 + 1) + sqrt(x^2 + 2) = 2
a) 0
b) 1
c) 2
d) 3
e) 4
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Hi there,
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19 Dec 2007, 13:38
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A
√(x²+1) + √(x²+2) > 1+1.41=2.41>2 at any x. Therefore, there are no roots
√(x²+1) + √(x²+2) > 1+1.41=2.41>2 at any x. Therefore, there are no roots
19 Dec 2007, 13:43
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I say A. No method, I just tried plugging in numbers.
