Try another version of this question Let `f(x) = sqrt((x^2-6x-27)/(x-7)) `. Write the domain of `f` as an interval. Box 1: Enter your answer using interval notation. Example: [2,5)
Use U for union to combine intervals. Example: (-oo,2] U [4,oo)
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. `[-3,7)uu[9,oo)`