i graphed it on a calculator and got (- infinity, infinity) but i'm really not sure if that's right because the parabola goes up. helpp!!
2006-09-07 12:25:02 · 4 answers · asked by kayteedella 1 in Science & Mathematics ➔ Mathematics
sqrt(x^2 - 7x - 8) >= 0
x^2 - 7x - 8 >= 0
(x - 8)(x + 1) >= 0
Domain
x <= -1
or
x >= 8
2006-09-07 13:44:45 · answer #1 · answered by Sherman81 6 · 0⤊ 0⤋
if the parabola goes up, then the parabola travels along the x axis in both directions into infinity, so -infinity to infinity is correct.
2006-09-07 12:31:17 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The Domain is all real numbers because there are no restrictions on the x value, such as x being under a square root, or x being in a denominator
2006-09-07 12:33:36 · answer #3 · answered by godmike 2 · 0⤊ 0⤋
Yes, the parabola should go up. That means that the range is limited. The parabola, theoretically, would keep going on indefinitely in each direction.
2006-09-07 12:31:20 · answer #4 · answered by mitchhodson 3 · 0⤊ 1⤋