Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.1 - Real Numbers - 1.1 Exercises: 57


$(-1, \infty)$

Work Step by Step

For interval notation, start with $-1$ and go to infinity, which is greater than that, for what values $x$ can be:$$-1,\infty$$Then add a paren on each side for $x$ not being equal to the value at that extreme:$$(-1,\infty)$$To graph, start with an open point at $-1$ to show that $x$ is not equal to $-1$, then shade towards positive infinity with an arrow on the end to show that $x$ can be any value along that axis.
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