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[" 19.For "x^(2)-(a+3)|x|+4=0" to have r...

[" 19.For "x^(2)-(a+3)|x|+4=0" to have real solutiong "],[" then the range of "a" is "],[[" (a) "(-oo,-7]uu[b,oo)," (b) "(-3,oo)],[" (c) "(-oo,-7]," (d) "[b,oo)]]

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