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Answer 1 · 2017-11-09T15:13:36

A , B and C

For end behaviour of polynomials we only need be concerned with the degree and leading coefficient. So:

For A.

#lim_(x->oo)(10x^4)=oo#

For B.

#lim_(x->oo)(15x^3)=oo#

For C.

#lim_(x->oo)(10x^4)=oo#

For D.

#lim_(x->oo)(-15x^3)=-oo#

So:

A , B and C all tend to #oo#

D tends to #-oo#