Posted by Riley on Saturday, August 28, 2010 at 1:42pm.
(1) f(x)=-(x²)+1
is a parabola concave downwards, with a y-intercept of 1.
Thus the behaviour toward both infinities are -∞.
2. f(x)=-10x³ (note correction of typo)
is a cubic polynomial that starts from +∞ when x->-∞, and finishes off at -∞ as x->∞.
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