General Chat / Math Fun!
- 14-June 03
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Turtleman Offline
I ask a problem and you asnwer it. Whoever gets it right gets to ask another.
Let us start easy...
Find the roots of x^2+2x-4 -
Turtleman Offline
Use the quadratic formula, x=(-b+or-square root of b²-4ac)/2a
EDIT: And I said find the roots which means you set the whole equation to 0. -
Turtleman Offline
OK... find F '(x) when F(x)=2x³+x²-3x+4
Well that is Calculus but it is easy..... For me atleast. -
Caddie Gone Mad Offline
That's algebra, idiot.OK... find F '(x) when F(x)=2x³+x²-3x+4
Well that is Calculus but it is easy..... For me atleast. -
MightyMouse Offline
I did some of those problems in Algebra at the end of this year!OK... find F '(x) when F(x)=2x³+x²-3x+4
Well that is Calculus but it is easy..... For me atleast. -
Turtleman Offline
LOL! No it isn't. If it is algebra then solve it. Hmm Find F prime of X.
That's algebra, idiot.OK... find F '(x) when F(x)=2x³+x²-3x+4
Well that is Calculus but it is easy..... For me atleast. -
Caddie Gone Mad Offline
Now why in the hell would I do that? I don;t have to do math for 3 months, and I'm keeping it that way. That factoring shit was easy. And you're 15. How the hell are you in calculus? -
Turtleman Offline
F '(x)=lim (F(x+h)-F(x))/h
h-0
So if F(x)=2x³+x²-3x+4 then:
((2(x+h)³+(x+h)²-3(x+h)+4)-(2x³+x²-3x+4))/h
So,
(2x³+6hx²+6xh²+2h³+x²+2hx+h²-3x-3h+4-2x³-x²+3x-4)/h
So,
(6hx²+6xh²+2h³+2hx+h²-3h)/h
Factor out a h,
(h(6x²+6xh+2h²+2x+h-3))/h
Cancel the h's,
6x²+6xh+2h²+2x+h-3
Sub 0 in for h because the limit is 0.
6x²+2x-3
So F '(x)=6x²+2x-3
So let's say x=1
That means if x=1 the slope will be 5 at that point of the function. Basically
F '(x)=6x²+2x-3
is a formula to find the slope of a point at any point.
And the reason I will be going into Calculus is because
1.) I love math
2.) It is easy for me
3.) I took Trig and Geometry over the Summer, so I am 2 years ahead of everyone. -
Turtleman Offline
Like I said above,That's nice, but please explain how a 15 year old is in calculus.
And the reason I will be going into Calculus is because
1.) I love math
2.) It is easy for me
3.) I took Trig and Geometry over the Summer, so I am 2 years ahead of everyone.
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