Enter your answer using inequality notation. Example: 3 <= x < 4
Use or to combine intervals. Example: x < 2 or x >= 3
Enter all real numbers for solutions of that type
Enter each value as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for an empty set. Use oo to enter Infinity.