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leehuan's All-Levels-Of-Maths SOS thread (1 Viewer)

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leehuan

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But yeah, also InteGrand's question for verification please
 

drsabz101

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Can somebody show how to solve the inequality g(x)>0, where g(x)= 1/x+3 - 2
 

drsabz101

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Also how would you determine the range and domain for this? What steps are taken
 

leehuan

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Euclidean Geometry and locus never made any sense to me. -_-



Part (i) and (ii) are easy. How do I go about (iii) and (iv)?
 

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Q. A function is defined by f(x)=ax^2+bx+c. It is known f(x) is odd, and f(5)=25. Fin a,b and c

I got b = -5 , but I don't know how to find a and c ?
 

drsabz101

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How would you apply the formula : f(-x)=-f(x) to get a and c
 

leehuan

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How would you apply the formula : f(-x)=-f(x) to get a and c
What he's saying is that if you think about it, if you have a quadratic x^2 lying around, it can't be an odd function; has to be even.

Euclidean Geometry and locus never made any sense to me. -_-



Part (i) and (ii) are easy. How do I go about (iii) and (iv)?
 

Drsoccerball

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The taylor series can be derived using the mean value theorem.





 

Drsoccerball

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ahahaha that question was the only question(That circle question) that fazed my maths teacher throughout the year. He labelled it as "The Cursed Question."

EDIT: Also that question was 2 marks the working out shouldn't of been that long...
 
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