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Mathematics: Post your doubts here!

Discussion in 'International A And AS Level' started by XPFMember, Sep 8, 2011.

  1. Lee Qian Yi

    Lee Qian Yi

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    Why?
     
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  3. Thought blocker

    Thought blocker

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    lol... tell me y it wont be like dat? xD
    mean temme wat did u do.. like how did u try dis?
     
  4. A*****

    A*****

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    Plz anyone helpppp....how will the last 2 parts be solved?
     

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  5. Holmes

    Holmes

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    Oct/Nov 2007
    upload_2017-11-15_22-24-20.png
    Help me differentiate plz!
     
  6. studyingrobot457

    studyingrobot457

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    easy
    product rule
    this means
    -e^(-x)*sin(x)+e^(-x)*cos(x)=0

    now solve the equation
     
  7. Holmes

    Holmes

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    Thanks bro! studyingrobot457
    It helped
     
  8. NerdyBirdy

    NerdyBirdy

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    Anyone there to help me I’m kinda stuck in this ques that says
    A curve has equation y=2x^2-2x
    Find the set of values of x for which y >9
    It’s from 9709/12/nov/dec/13
     
  9. Thought blocker

    Thought blocker

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    2x^2 - 2x > 9
    2x^2 - 2x - 9 > 0
    Solve this. And suppose u got solme value a and b where b < a then ur final answer will be x > a and x < b
     
  10. Lisa Lunina

    Lisa Lunina

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    Guys, plz help me on this asda.png
     
  11. MShaheerUddin

    MShaheerUddin

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    We have to find integral constant C here
     

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  12. Lisa Lunina

    Lisa Lunina

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    What should i do then? I am really bad when it comes to integral
     
  13. MShaheerUddin

    MShaheerUddin

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    Ive attached the solution see.. If it doesnt help then tell me
     
  14. Lisa Lunina

    Lisa Lunina

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    Ooohh.. I dont see it before haha. Thank you! It helped me a lot
     
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  15. Lisa Lunina

    Lisa Lunina

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    Guys! Plz help me! Im stuck again on integration problem. I cant answer any of the question below. Picture2.png
     

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    Last edited: Jan 2, 2018
  16. Boby Max

    Boby Max

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    Please help me on functions. I forgotten all the basics. Picture3.png
     
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  17. MShaheerUddin

    MShaheerUddin

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    Here you go lisa ☺️ see attachments
    151510279186882505115.jpg 15151028685081468372770.jpg
     
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  18. Lisa Lunina

    Lisa Lunina

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  19. Hadi Murtaza

    Hadi Murtaza

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    still need help with that ?
     
  20. thestudyguy

    thestudyguy

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    Can anyone please help me .
    9709/12/O/N/17


    Each year, the value of a certain rare stamp increases by 5% of its value at the beginning of the year. A collector bought the stamp for $10 000 at the beginning of 2005. Find its value at the beginning of 2015 correct to the nearest $100.
     
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  21. Hadi Murtaza

    Hadi Murtaza

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    Very similar to compound interest.
    F = P(1 + r/100)^n
    Where
    F = Final amount
    P = Initial amount
    r = increment
    n = number of years

    F = 10,000(1 + 5/100)^10
    F = 10,000(1.05)^10
    F = 10,000(1.6289)
    [ F = $16,289 ≈ $16,300 ]
     

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