If x is an integer and (x)(x^2)(x^3)(x^4) is positive, which of the following could be negative? Choose the correct answer.
A) x^4  B) (x)(x^3)  C) (x)(x)  D) 3x^2  E) x + x^5
A) X^4 - always positive (or 0).   B) X(X^3) = X^4 - Again always positive (or 0).   C) (x)(x) = X^2 - Again always positive (or 0).   D) 3X^2 - again always positive (or 0)   E) x+x^5 - Could be -ve if x is -ve.   Answer x + x^5.
<result>E</result>
If x is an integer and (x)(x^2)(x^3)(x^4) is positive, which of the following could be negative?