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[" EXAMPLE 40The number of real roots of...

[" EXAMPLE 40The number of real roots of the equation "],[qquad sqrt(1+sqrt(5)x+5x^(2))+sqrt(1-sqrt(5)x+5x^(2))=4," is "],[[" (a) "0," (b) "1," (c) "2," (d) "4]]

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