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[" 131.If "a,b,c" are in "GP" ,then the ...

[" 131.If "a,b,c" are in "GP" ,then the equations "ax^(2)+],[2bx+c=0" and "dx^(2)+2ex+f=0" have a "],[" common root in ald,ble,cif are in "],[[" 1) "AP" ."," (1) "GP" ."," A.P."," 4) none of these "]]

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