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algebra intermediate

Problem

The quadratic satisfies for all real numbers Enter and in increasing order. For example, if you think then enter "f(4), f(2), f(1)".
Solution
The graph of is an upward-facing parabola, and the condition tells us that the axis of symmetry of the parabola is the line Thus, is an increasing function of In other words, the farther is from 2, the greater is.



Hence,
Final answer
f(2) < f(1) < f(4)