Use a graphing calculator to find, approximately the range of the function. $$f ( x ) = 2 x ^ { 4 } - x ^ { 3 } + x ^ { 2 } + 2 x - 7$$
A) $[ - 2,7 )$
B) $( - \infty , \infty )$
C) $[ - 14 , \infty )$
D) $[ - 7 , \infty )$
E) $[ - \infty , 7 )$

Question

Quizplus · Accepted Answer

Using a graphing calculator, we can graph the function and see that the lowest point on the graph is approximately $(-1.5,-12.875)$. Therefore, the range of the function is $[-12.875,\infty)$, which is only given as choice D.

Use a Graphing Calculator to Find, Approximately the Range of the Function