this questions be giving me trouble, does anyone know how to do it (the steps) not the answer
<*=less than or equal to, greater than or equal to
in the domain of
f(X)=2x+1 is {-2,<*x <* 3}
which integer is not in the range?
2006-10-30 10:17:27 · 4 answers · asked by mapassqadri 2 in Science & Mathematics ➔ Mathematics
f(x) is an increasing function.
f(-2) = 2(-2) + 1 = -4 + 1 = -3
f(3) = 2(3) + 1 = 6 + 1 = 7
Any number that is less than -3 or greater than 7 will not be in the range using the given domain.
2006-10-30 10:20:17 · answer #1 · answered by MsMath 7 · 0⤊ 0⤋
the range is found by plugging in the endpoints of the domain
2(-2)+1=(-3
2006-10-30 18:21:02 · answer #2 · answered by Anonymous · 0⤊ 0⤋
2x+1 is inbetween [-2,3](You should know "interval notation" )
graph it.
or
Plug in X=-2 into that equation
Then plug in x=3
You get Range = [-3,7]
so.. (-infinity,-3]U[7, infinity) is not in the range... hope that helps XD
2006-10-30 19:22:10 · answer #3 · answered by eugene w 1 · 0⤊ 0⤋
Hi. A negative times a positive is a negative.
2006-10-30 18:22:22 · answer #4 · answered by Cirric 7 · 0⤊ 1⤋