Pure Maths 12 today........

[hussamh10]

for binominal what was A?? was it 2??
and what was the domain for q2

 

[Gunner7]

Does anyone know how to answer Q10(b) the minimum value of the curve and also to prove that its a minimum?

The question was about the minimum value of the 'Gradient' not the curve,So DY/DX of the curve is the equation of the tangent,D^2Y/DX^2 is the second deff of curve but first deff of Gradient,so you get D^2Y/DX^2 and equal it to 0,get the X substitute it into DX/DY to get minimum value of 'Gradient',and to make sure that it's a minimum value I got Third deff which was second deff of gradient got a positive product which means it's minimum.

 

[Gunner7]

for binominal what was A?? was it 2??
and what was the domain for q2

Yup A was 2, and domain was x>-1 or x>1 cant remember the sign

 

[kevin94]

domain was equal or more than 1 or only more than 1
because i wrote equal or more

 

[hussamh10]

Yup A was 2, and domain was x>-1 or x>1 cant remember the sign

the range of Function was F(x)>3 so it would be the domain of inverse wasnt that the answe?

 

[Gunner7]

domain was equal or more than 1 or only more than 1
because i wrote equal or more

Yup there was equal sign but I actually can't find it here on the Keyboard

 

[iKhaled]

domain was equal or more than 1 or only more than 1
because i wrote equal or more

i dont think they care about adding the equal sign

 

[kevin94]

the domain was f(x) (> or =) 3

 

[kevin24]

Yup A was 2, and domain was x>-1 or x>1 cant remember the sign

I got it x>-1. And do you know the value of k which involves simultaneous eqn.I think its y=3x +K and y= 4X2.

 

[kevin94]

wasnt it x>+1 ?
k was -1

 

[kevin24]

For Q11 do anyone know how to prove the value of x =7.8... and the perimeter?

 

[Gunner7]

The range was not given,I Had to get it then place it as the domain of inverse,domain of function was x>3 not the inverse ? can't really remember if you still remember the function we can solve it again

 

[kevin94]

For Q11 do anyone know how to prove the value of x =7.8... and the perimeter?

You had to make a triangle with
angle 0.6 (edited)
hyp=20-x
opp=x

 

[hussamh10]

The range was not given,I Had to get it then place it as the domain of inverse,domain of function was x>3 not the inverse ? can't really remember if you still remember the function we can solve it again

yeah uare right igot the same...

 

[kevin94]

You had to make a triangle with
angle 1.2
hyp=20-x
opp=x

but i'm not sure for the rest because i think i misread the question :/

 

[hussamh10]

You had to make a triangle with
angle 1.2
hyp=20-x
opp=x

yeah that was the way it took me 15 min

 

[Gunner7]

Show that in the 2nd question was kind of easy,still took me about 10 mins to get it

 

[kevin24]

Has anyone able to finish the paper?

 

[kevin94]

I made so many stupid mistakes!! T___T
for the area of the playgroud i think that they asked to write the minimum value of the area but i instead left it at x=15 T___T
I was too hasty and did not entirely read the question

 

[kevin94]

Has anyone able to finish the paper?

Finished but with some stupid mistakes