Question

what is the domain of 5x^2-1

Answer 1

answer choices? and heyyy welcome to open study mathmatics!!

Answer 2

is there any reason that you cant plug in any real number for x?

Answer 3

(f/g)(x), x^2+8x/5x^2-1, What is the domain?

Answer 4

Thanks gabgurl!

Answer 5

ahh much different

Answer 6

ahh well the denominator cant be equal to 0
so find out what makes that true and exclude those numbers

so

5x^2-1=0 implies 5x^2=1implies x^2 = 1/5 implies \(x=\pm\sqrt{\frac{1}{5}}\)

Answer 7

so the domain is \(D = \{x\in \mathbb{R} \ | \ x\ne \pm\sqrt{\frac{1}{5}}\}\)

Answer 8

It has to be written in interval notation.

Answer 9

You are AWESOME by the way! I was close but no cigar!