There are one of the following behaviours for every polynomials:
(i)y→∞asx∞andy→∞asx→−∞
(ii)y→∞asx∞andy→−∞asx→−∞
(iii)y→−∞asx∞andy→∞asx→−∞
(iv)y→−∞asx∞andy→−∞asx→−∞
a.) y=x3−8x2+2x−15, end behaviour x(ii)x_
b.) y=−2x4+12x+100, end behaviour x(iv)x_
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