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  1. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread No need got the answer
  2. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Can you show how to do this question, I am assuming you use parametric differentiation?
  3. drsabz101

    leehuan's All-Levels-Of-Maths SOS thread

    How would you apply the formula : f(-x)=-f(x) to get a and c
  4. drsabz101

    leehuan's All-Levels-Of-Maths SOS thread

    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 ?
  5. drsabz101

    leehuan's All-Levels-Of-Maths SOS thread

    Also how would you determine the range and domain for this? What steps are taken
  7. drsabz101

    leehuan's All-Levels-Of-Maths SOS thread

    how did you get : 0< x+3< 1/2
  8. drsabz101

    leehuan's All-Levels-Of-Maths SOS thread

    Can somebody show how to solve the inequality g(x)>0, where g(x)= 1/x+3 - 2
  9. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread so does it come to : -6-a=1/x+a
  10. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread How do I approach this question after I differentiate it?
  11. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread got the solution
  13. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread When I differentiated it I got: dy/dx= 12(4x-7)^2 I equated this with 108, and got 192x^2-672x+480=0?
  14. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Can someone outline the steps I need to take to solve this :
  15. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Oh true! I just re did it and got the answer. thanks heaps
  16. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Okay Thankyou. Also , for this question 5.a, I first differentiated the equation using the chain rule, to find the equation of the gradient. The because it said it was at x=1., I substituted in x=1 into the gradient getting...
  17. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Why is the function defined at points where x^2-2x>0? only.
  19. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Sorry Q.4K
  20. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Can someone explain why the answer is no coordinates , since x=1 is out of the domain. how did they know this? In relation to question 4 f
  21. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread How does this give x=0?, as a coordinate I have differentiated this correctly
  22. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Yup got this answer , but thanks for the help !
  23. drsabz101

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Okay thankyou guys!
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