Posted by Jen on Tuesday, June 2, 2009 at 11:25pm.
Please solve for the interval notation corresponding to the set notation
{x  x < –7}

Algebra  MathMate, Tuesday, June 2, 2009 at 11:29pm
See answer to Rachale's question.
http://www.jiskha.com/display.cgi?id=1243987256

Algebra  Jen, Tuesday, June 2, 2009 at 11:32pm
Thank you, but why is it
(infinity 7)?
is it translated to
negative infinity  7?

Algebra  MathMate, Tuesday, June 2, 2009 at 11:38pm
> [5,8) is the same as {x5=<x<8}
meaning that the square bracket [ includes the lower limit, while the ] includes the upper limit. The limits are separated by a comma.
You are right in actual practice, it is normal to exclude infinity or negative infinity. In my books, infinity is a short form for negative infinity.
So the correct answer would be:
(negative infinity, 7)

Algebra  Jen, Wednesday, June 3, 2009 at 12:05am
Thank you for the explanation!
Answer This Question
Related Questions
 math  Please help. Hi, I am having some problems with inequalities. It is ...
 Algebra  Write the interval notation corresponding to the set notation {x  x &...
 Algebra  Write the interval notation corresponding to the set notation {x  x &...
 Algebra  Write the interval notation corresponding to the set notation {x  x &...
 Algebra  Solve and express in interval notation Solve: 5 – 8x > 11 and ...
 mathinequalities  Hi, I am having some problems with inequalities. It is ...
 Math Help Please  Please show me how to put this in interval notation. Thanks! ...
 math/algebra  Solve the polynomial inequality and graph the solution set on a ...
 algebra  Solve the polynomial inequality and graph the solution set on a real ...
 Algebra  Solve the polynomial inequality and graph the solution set on a real ...
More Related Questions