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Tôi yêu Việt Nam. I love Vietnam
Lv 4
Tôi yêu Việt Nam. I love Vietnam asked in Science & MathematicsMathematics · 8 years ago

Need some formula to do the competition well tomorrow?

Hello, I'm Diem from Vietnam, i'm 14 and i need your help.

I'll have a Doing-Math-By-Using-Casio-Caculator competition tomorrow and i'm afraid now because i don't have a well-preparation.

So i very need you. I want you to give me some formulas to do that quickly and exactly.

That's something about Trigonometry, arithmetic, algebra or everything you know

Thank you very much

1 Answer

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  • Karnage
    Lv 5
    8 years ago
    Favorite Answer

    I realize that your competition has passed already, but a good arithmetic formula for the sum of natural numbers from 0 to n is n(n+1)/2

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