1.

Solve the inequality P(x)=x^(3)-4x^(2)+x+4 gt0.

Answer»

Solution :USE a calculator to GRAPH `y=P(x)` and find its (approximate) ZEROS: `-0.814,1.471, and 3.343`.

Observe that the graph of `y=P(x)` is above the x-axis for -0.814`ltxlt1.471` or `x GT 3.343`.


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