Hi Guys

Can you do Q4 from the sheet below:

Can you do Q4 from the sheet below:

Mr Mac

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Hi Guys

Can you do Q4 from the sheet below:

Can you do Q4 from the sheet below:

Mr Mac

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Hi, me AGAIN, im very confused. What would u do for 4b on the straight line question

Hi Kaitlin

No problem at all, that’s what the Blog is for. In question 4b it asks for the intersection on the y-axis (point D). The y-intercept in other words, so make x=o to find the y value.

What exactly is it you are wanting to speak to me about RE Differentiation? Is it just notes to catch up? Was it functions you mean?

Mr Mac

Also can I see u monday lunchtime for the differentiation stuff

I know I have got 4a) wrong as I have x=0 and 9/4

I had x*2(9-4x).

Where did I go wrong ?

Hi Euan

Before you differentiate the function you must break the bracket Euan.

3x*3 – x*4

Then differentiate.

Mr Mac

Sorry still stuck. I got to x(3x-2x)(3x+2x)=0

Hi Euan

Actually just got a chance to look at the whole thing again. I’m certain you were correct the first time. Once you differentiate then you do indeed get x=0 and x=9/4.

However, those are just the stationary points. You still have to find the values for x=0 and y=0.

Mr Mac