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[" 2.If "y=3^(x-1)+3^(-x-1)" ,then the l...

[" 2.If "y=3^(x-1)+3^(-x-1)" ,then the least value of "y" is "],[[(a)<=2," (b) "26quad 2/3],[" (c) "-2/3," (d) "-3/2]]

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