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btw if this one came hard the other component with come easier (i hope ) anyways el7amdella
and thx you in advanceyou will lose the A1 ( Accuracy mark ) and for part 2 ECF if ur steps in part 2 were correctbtw for question 4 about to find k i solved everything and when i reached to find i got k=1 i think i frgt to put th sign somewhere else , will i loose much, and will this affect the mark of the second part were is asked to find P or will they count as E.C.F
Me too! where did you lose it?
But did you manage to do it?
I took third derivative on the question itself so technically it was fourth derivative..
How did you solve it? I spent so much time on that in the end, but didn't get it...
Just differentiate the dy/dx given in the question to give second derivative, then you put 2 instead of X then dy^2/dx=0 . To prove it differentiate it again (dy^3/dx)and you'll get a positive number. To find the minimum value substitute 2 in the first equation (dy/dx). Hope I helped
Y do u need to differetiate a third time?Just differentiate the dy/dx given in the question to give second derivative, then you put 2 instead of X then dy^2/dx=0 . To prove it differentiate it again (dy^3/dx)and you'll get a positive number. To find the minimum value substitute 2 in the first equation (dy/dx). Hope I helped
To prove that it is a minimum and not a maximum, remember, they are asking for the minimum of the GRADIENT and NOT the curve
So I think its another mistake I have done. I only calculate the second derivative and answer that the minimum is 0.
Yes!!
I did l=a+(n-1)d < 360 degrees and got 179! :s
No.. did part(ii) and found only lengths of OP and OR in the last one. You did?
Y has u put the less sign the sum of all angle is equal to 360 degrees not less than! And the answer is 18.
I am..
I did.. Area = Area of rectangle - Area of all three triangles. i got it like that. what did you do?
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