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If a,b,c in R and a+b+c=0, then the qua...

If `a,b,c in R and a+b+c=0,` then the quadratic equation `3ax^2+2bx+c=0` has (a) at least one root in `[0, 1]` (b) at least one root in `[1,2]` (c) at least one root in `[3/2, 2]` (d) none of these

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