Posted by **Gertrude** on Wednesday, August 31, 2011 at 6:04pm.

I am having a mental block. I have the answer to the question. It is

(-,). I just need help figuring it out. The equation is:

x^2+1>0

- Calculus -
**MathMate**, Wednesday, August 31, 2011 at 7:44pm
If you meant (-&infin,+&infin), your answer is correct.

1 is already >0, and x^2 is ≥0 ∀x∈R, therefore x∈R will satisfy the given inequality.

To post ∞, you can type:

& i n f i n ;

without typing the intevening spaces.

The "Microsoft Word" symbols/alt-code are not interpreted correctly here.

## Answer this Question

## Related Questions

Physics - The question is: A small block of ice at 0oC is subjected to 10 g of ...

calculus - im having so much trouble figuring out how to get these answers. i ...

Calculus - Hi! I am having trouble figuring out the derivative of ln[sin^2(x)+3...

Quadratic equations Trig - I am having a hard time figuring this out. I know I ...

physicS - A block slides down a frictionless plane having an inclination of 14.6...

Math - I need help... I dont need the answer just how I would figure this out. ...

Maths - Hi, I have to produce a sketch of a line that passes through the points...

calculus - Sketch the curve y = x^3 - 12x^2 + 36x I already did the question ...

12th grade English - I need help i have to have a literary term for ch. 1,2,3,5,...

Statistics - 10, 12, 16, 17, 20 I'm having a problem figuring out how the answer...