Question

True or false4. The interval notation [-1,12) is equivalent to saying -1≤ x<12.

Answer 1

The interval notation [-1,12) is equivalent to saying -1 ≤ x < 12

The opening block bracket [ means that -1 is part of the value of x while the curve bracket ) means 12 is not inclusive among the values of x.

So, [-1,12) is equivalent to -1 ≤ x < 12, therefore, the answer is true.