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Test: PSAT Math
1. | All of the following functions have a exactly one root EXCEPT: |
f(x) = (1/4)x2 + x + 1
f(x) = 9x2 – 6x + 4
f(x) = x2 – 2x + 1
f(x) = 4x2 – 4x+1
f(x) = (–1/9)x2 + 6x – 81
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