Question

College admission question

Answer 1

Strategy: Assume one of the inequalities hold, try to deduce the other inequalities.

Since x^4 +1>0 for all x real, B) holds if and only if C) holds.

C) iff A) holds if x>1.

Answer 2

x⁴+1 cannot be 0 and thus it doesn't matter on the denominator.
Therefore is B and C will have the same set of solutions

Answer 3

x⁴+1 cannot be 0 and thus it doesn't matter on the denominator.
Therefore is B and C will have the same set of solutions