Question

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

Answer 1

1x can also be taken as x. Thus, the expression is same as

-1≤x<12

The numbers satisfying this inequality are between 1 and 12

[ indicates that - 1 is inclusive hence, we used ≤

) indicates that 12 is not inclusive hence, we used )

Thus, the statement is true