Aysce

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  RishBonjour

• Nov 29, 2011

Today at 7am you sent me the message? LOL you check bos before school?
just got back from tutoring man (9.30 pm) fkkk 4u test tommorow

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  RishBonjour

• Nov 29, 2011

thanks for the add LOL, shouldn't you be sleeping? got early class tommorow fml

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  thorax94

• Nov 29, 2011

Yeah. It's a bit hard to explain but it was a trapezium inside a circle. Circle's diameter was 10 and the the base of the trapezium was the diameter. The opposite side was a chord on the circle. The question was find max area. There was a little bit more information but you get my drift

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  Aysce

• Nov 28, 2011

Do you roughly know what the max and min q is?

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  thorax94

• Nov 28, 2011

ugh they are painful. The test was nice though. They broke it up into 3 questions for me but hopeless me couldn't get the last one out. 5/30 marks gone.

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  thorax94

• Nov 28, 2011

The max and min bit was the hardest for me and I am currently taking 4 units of math.

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  thorax94

• Nov 28, 2011

The 2 unit test was on calculus

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  bleakarcher

• Nov 26, 2011

yeh lol

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  bleakarcher

• Nov 26, 2011

the question identifies the variables for you, or most of them for that matter. start off by finding an equation which relates the two variables then find the formula for some quantity which needs to be maximised/minimised in terms of the two variables. now, you want the formula in terms of only a single variable and so throughout the relationship between the two variables you would have developed at the beginning, substitute one variable so that the formula is now in terms of a single variable. carry on to find the stationary pts of the quantity which is said to be maximised/minimised and then you should be able to answer.

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  Skeptyks

• Oct 24, 2011

Thanks ace, nice DP :]

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  jnney

• Oct 14, 2011

haha. i hated year 11 biology. good luck!

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  jnney

• Oct 14, 2011

you're going to be fine, just go on with the year 12 topics.

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  Amogh

• Oct 7, 2011

Okay, so let the roots be a, a, b
Their sum is 2a + b = -m
Product is a^2 * b = 7
Sum two at a time is 2ab + a^2 = -15
Solve simultaneously and you'll get m
Cheers

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  SpiralFlex

• Oct 5, 2011

I ate him.

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  SpiralFlex

• Oct 5, 2011

No, e^-x(x-1) if you differentiate that you get (2-x)e^-x. Differentiating xe^-x will get you e^-x (1-x). Where did you get this question?

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  SpiralFlex

• Oct 5, 2011

Using the product rule,

d/dx x(e^-x)=(e^-x) + x * - (e^-x)

=e^-x(1-x)

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  SpiralFlex

• Sep 19, 2011

Indeed human.

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  SpiralFlex

• Sep 17, 2011

When do you ever get to sleep?

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  SpiralFlex

• Jul 21, 2011

Nope.

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  SpiralFlex

• Jul 21, 2011

Yes. It's not that. But enrol now! As integration starts!