Hello, we just started with these friendly little critters in math today, and the teacher promised a 10 class mark (A+) if anyone could correctly write this function in the following format:
[-A if x > or = z
|A|=
[A if x < z
That's the best I can explain it, so if you can grasp my question please try to answer it. The function she wants us to write correctly is:
f(x)=| x*2 -5x +4 | (*Meaning elevated to).
The second degree equation gives two results: +4 and +1. Kudos in advance for the help!
2007-11-05 05:39:13 · 2 answers · asked by Murodski 1 in Science & Mathematics ➔ Mathematics
Apparently it needs to be in compound function format (Piecewise). Sorry about now knowing the name, didn't know the translation from Spanish :P.
2007-11-05 05:42:47 · update #1
Could it possibly be:
f(x)= -(x*2-5x+4) if 1
2007-11-05 06:11:59 · update #2
Te lo explico en espanol
el signo de x^2-5x+4 es:
++++++++(1)----------(4)++++++++
de modo f(x ) = x^2-5x+4 si x<= 1
f(x) = -x^2+5x-4 s 1< x<=4
finalmente
f(x) = x^2-5x+4 si x>4
Puedes acomodarlo al formato pedido
2007-11-05 05:56:04 · answer #1 · answered by santmann2002 7 · 0⤊ 0⤋
x*2 -5x +4 = 0 when x = 4 or 1,
x*2 -5x +4 > 0 when (-Inf, 1] < x < [4, Inf), and
x*2 -5x +4 < 0 when 1 < x < 4.
2007-11-05 14:02:54 · answer #2 · answered by mr green 4 · 0⤊ 0⤋