If x > 1, which of the following decreases as x decreases?
I. x + x^3
II. 2x^2 − x
III. 1/(x + 1)	Select: A) I only B) II only C) III only D) I and III E) II and II
let x= 4 and 3 b old and new values   ST1: x= 4 -&gt; 4+64 = 68   x=3-&gt; 3+27= 30 ...decreased   ST2:x= 4-&gt; 2*16-4 = 28   x=3-&gt;2*9-3 = 15   decreased   St3: x=4-&gt; 1/4 = .25   x=3-&gt;1/3 = .33   Ans: II and II
<result>E</result>
If x > 1, which of the following decreases as x decreases?
I. x + x^3
II. 2x^2 − x
III. 1/(x + 1)