Posted by **Anonymous** on Saturday, March 21, 2009 at 11:41pm.

PlEASE HELP ME!!! I WOULD GREATLY APPRECIATE IT!!!!

Find the least upper bound (if it exists) and the greatest lower

bound (if it exists) for the given set.

Please show all work.

(0, 2)

(−∞, 1)

{x : x2 < 4}

{x : x4 ≤ 16}

{5/2,7/3,9/4}

{0. 9, 0. 99, 0. 999, . . .}

{x : lnx > 0}

{x : x2 + x − 1 < 0}

{x : |x − 1| > 2}

{x : sin x ≥ −1}

- CALCULUS: PLEASE HELP ME !!!!! -
**bobpursley**, Sunday, March 22, 2009 at 5:41am
What are you having difficulty with on this? Look at the last one.

sinx>=-1

what is the range of sinX? between +1 and -1, right, for any x. So for any x, sinx >=-1. So x is unbounded.

I am uncertain what your difficulty is on this.

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