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C3 Function question

Mya i have some with this questions please with step by step details, thankyou.

"The function h is defined by h(x)=x2−6x+20x≥a h(x) = x^2 -6x + 20 {x\geq a}
Given that h(x) is a one to one function find the smalles possible value of the constant a.

Also it gives me a hint, "complete the square for h(x)", i tried doing this and i still didnt get the right answer. the answer is 3.
(edited 13 years ago)
Are you sure you've wrote the question down right?
x2−6x+20xx^2-6x+20x? I'm not sure that's what the question would ask.
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Avatar for steve2005
steve2005
17
Original post by Core
Mya i have some with this questions please with step by step details, thankyou.

"The function h is defined by h(x)=x2−6x+20x≥a h(x) = x^2 -6x + 20 {x\geq a}
Given that h(x) is a one to one function find the smalles possible value of the constant a.

Also it gives me a hint, "complete the square for h(x)", i tried doing this and i still didnt get the right answer. the answer is 3.


I think it should be x^2-6x+20 i.e. not 20x
Original post by steve2005
I think it should be x^2-6x+20 i.e. not 20x


Even if it was though, you would get a = 11 as the answer rather than 3.
Reply 5
Avatar for Core
Core
OP
6
the question was written incorrectly there was meant to be a space bewteen the 20 and the x, i was pmed the solution ty for attempting to help though.

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