Maths, Addmaths and Statistics: Post your doubts here!

[GetSomeLife]

HOW WAS THE PAPER GUYS?

 

[Steel Arm]

HOW WAS THE PAPER GUYS?

canot discuss b4 24hrs....
anyway i think it was easy

 

[Muniba Suhail]

canot discuss b4 24hrs....
anyway i think it was easy

me too, it went great

 

[Steel Arm]

me too, it went great

expectations??? A*?
i guess too early to call....p2 still to come

 

[Muniba Suhail]

expectations??? A*?
i guess too early to call....p2 still to come

yeah too early to tell... but it went really good.
Which one did you attempt, either or or?

 

[Steel Arm]

yeah too early to tell... but it went really good.
Which one did you attempt, either or or?

either..... you?

 

[Muniba Suhail]

either..... you?

either, the cordinates of the stationary points were (0, 0) right?
and their nature was minimum..

 

[Steel Arm]

that's exact!

either, the cordinates of the stationary points were (0, 0) right?
and their nature was minimum..

 

[Muniba Suhail]

that's exact!

yaee, i got really confused seeing (0, 0) as the ans.

 

[Steel Arm]

yaee, i got really confused seeing (0, 0) as the ans.

yeah me 2

 

[Miss_Z]

Praise the Lord! I panicked like hell when I got (0,0)

 

[Muniba Suhail]

Praise the Lord! I panicked like hell when I got (0,0)

what about b=2? how did we have to show that?

 

[Steel Arm]

what about b=2? how did we have to show that?

shold have been by differentiation

 

[Muniba Suhail]

shold have been by differentiation

yeah, got it by differentiation ^_^

 

[Miss_Z]

Yuppies

 

[Joseph Potts]

I've been trying to find a solution to this problem for a while, but have failed. Here's the question:

Q: Given that the greatest value of k + 8x - 2x² is 9, find the value of the constant k.

 

[Drockz]

I've been trying to find a solution to this problem for a while, but have failed. Here's the question:

Q: Given that the greatest value of k + 8x - 2x² is 9, find the value of the constant k.

since the question says greatest value..... differentiate the expression and equate to zero you will get x as 2 .... substitute this value into the expression and equate the the answer to 9 ...... k = 1

 

[Adeena]

i want to keep statistics as an extra subject in O level...bt i want to know whether it is easy to score an A* in it????

 

[RadzMau]

Can someone solve this pls?
log5y= 4logy5

 

[Muniba Suhail]

Can someone solve this pls?
log5y= 4logy5

4logy5 can be changed to 4/log5y ie. log5y = 4/log5y
Then shift log5y to the other side making log5y square = 4.
Take under root on either side resulting in log5y = 2.
And hence, y=25.