Sorry very noob maths question (1 Viewer)

[fullonoob]

find x when:
3=3x^2
do u divide 1st of root 1st??? Not sure sorry
Divide:1=x^2
x=1

Root: root3=3x
x=root3 over 3

so which one is it???
i forgot
Post ASAP please

 

[jellybelly08]

Root: root3=3x
x=root3 over 3

No, its:

root3=root(3*x^2)
=root3*x
so x=1

 

[YO!]

:rofl: HAHAHAHAHA! That question is serious noob-style.

 

[fullonoob]

No, its:

root3=root(3*x^2)
=root3*x
so x=1

No...
if its root then it should b:
root3= 3x (square cancel root)
x = root 3 over 3
am i correct?

 

[jellybelly08]

No...
if its root then it should b:
root3= 3x (square cancel root)
x = root 3 over 3
am i correct?

Is the question asking

3=3*(x^2)
OR
3=(3*x)^2
???

 

[fullonoob]

Is the question asking

3=3*(x^2)
OR
3=(3*x)^2
???

2nd one
(3x)^2

 

[jellybelly08]

2nd one
(3x)^2

So basically 3 = 9*x^2.

Then yea its x = root3/3

Sorry for the confusion but they way you put it in your first post made it seem like 3*x^2

 

[fullonoob]

and another noob question
can u differentiate twice?e.g. x^3 - x^2
y'=3x^2-2x
differentiate agn
y'=6x-2
can u do that?

 

[jellybelly08]

and another noob question
can u differentiate twice?e.g. x^3 - x^2
y'=3x^2-2x
differentiate agn
y''=6x-2
can u do that?

Notice the extra '

The first derivative (y') tells you the slope of the function, the second derivative (y'') tells you about the rate of change of the slope.

 

[jordankuai22]

and another noob question
can u differentiate twice?e.g. x^3 - x^2
y'=3x^2-2x
differentiate agn
y'=6x-2
can u do that?

yes. you can do this.

troll? or actually retarded

 

[x.Exhaust.x]

and another noob question
can u differentiate twice?e.g. x^3 - x^2
y'=3x^2-2x
differentiate agn
y'=6x-2
can u do that?

1) y'=6x-2

2) y'=6

 

[bored of sc]

find x when:
3=(3x)^2

3 = (3x)²
Take the square root of both sides.
+ root 3 = 3x
Divide each side by 3.
+ root 3 / 3 = x

 

[Aplus]

and another noob question
can u differentiate twice?e.g. x^3 - x^2
y'=3x^2-2x
differentiate agn
y'=6x-2
can u do that?

f(x) = x³ - x²
You take each part separately:
f(x) = 3x² - 2x
I think you tried to differentiate 3x² again, looking from your post. You don't differentiate twice. Once you've differentiated it, that's it. Don't mutilate it any further lol.

 

[adash]

1) y'=6x-2

2) y'=6

y" actually.

 

[kaz1]

and another noob question
can u differentiate twice?e.g. x^3 - x^2
y'=3x^2-2x
differentiate agn
y'=6x-2
can u do that?

Youonly do that to find the second derivative or find the points of inflexion.