Russian l can you solve?? l Hardest Olympiad Math Problem

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  • Опубліковано 5 лют 2025
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КОМЕНТАРІ •

  • @SuchetaDembowski
    @SuchetaDembowski 3 години тому

    Beautifully penned and expanded. I would purchase a TV to watch this kind of "programming". But then again, "a BOY" labelled me "the girl with numbers between her ears" in 9th grade. I am a woman of " a particular age" now. THANKS for allowing me my daily dose of FUN!

  • @LEARN_WITH_SHAZAIN
    @LEARN_WITH_SHAZAIN Місяць тому

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  • @dwiyantowibisana4928
    @dwiyantowibisana4928 Місяць тому +1

    a=1, b=4

  • @novellobrancher9627
    @novellobrancher9627 Місяць тому +1

    😯👏👏👏👏👏

  • @joernbeineke
    @joernbeineke Місяць тому +2

    a=4 and b=1 :)

    • @lionelfischer8240
      @lionelfischer8240 Місяць тому

      ou a=1 et b =4, 2 solutions.

    • @mtrichie111
      @mtrichie111 Місяць тому

      Lmao, first thing I thought before I played video

  • @walterwen2975
    @walterwen2975 Місяць тому

    Hardest Olympiad Math Problem: a²(√a) + b²(√b) = 33, √a + √b = 3, a, b > 0; a, b =?
    3 > √a > √b > 0 or 3 > √b > √a > 0, a, b ϵ R
    √b = 3 - √a; a²(√a) + b²(√b) = (√a)⁵ + (√b)⁵ = (√a)⁵ + (3 - √a)⁵ = 33
    Let: x = √a, (√a)⁵ + (3 - √a)⁵ = x⁵ + (3 - x)⁵ = x⁵ - (x - 3)⁵ = 33, a, b ϵ R; x ϵ R
    x⁵ - [x⁵ - 5(3)x⁴ + 10(3²)x³ - 10(3³)x² + 5(3⁴)x - 3⁵] = 33
    15(x⁴ - 6x³ + 18x² - 27x) + 243 - 33 = 15(x⁴ - 6x³ + 18x² - 27x + 14) = 0
    x⁴ - 6x³ + 18x² - 27x + 14 = (x⁴ - 6x³ + 8x²) + (10x² - 27x + 14) = 0
    (x - 2)(x³ - 4x²) + (x - 2)(10x - 7) = (x - 2)(x³ - 4x² + 10x - 7) = 0
    x³ - 4x² + 10x - 7 = (x³ - 4x² + 3x) + 7(x - 1) = (x - 1)(x² - 3x) + 7(x - 1)
    = (x - 1)(x² - 3x + 7), x⁴ - 6x³ + 18x² - 27x + 14 = (x - 2)(x - 1)(x² - 3x + 7) = 0
    x² - 3x + 7 = 0, x = (3 ± i√19)/2, Rejected; x ϵ R
    x - 2 = 0, x = 2 = √a, a = 4; √b = 3 - √a = 3 - 2 = 1, b = 1
    x - 1 = 0, x = 1 = √a, a = 1; √b = 3 - √a = 3 - 1 = 2, b = 4
    Answer check:;
    a = 4, b = 1, a = 1, b = 4
    a²(√a) + b²(√b) = 16(2) + 1 = 1 + 16(2) = 33, √a + √b = 2 + 1 = 1 + 2; Confirmed
    Final answer:
    a = 4, b = 1; a = 1, b = 4
    Note:
    Two complex value roots, if acceptable;
    √a = (3 ± i√19)/2, a = [(3 ± i√19)/2]² = (- 5 ± 3i√19)/2; x = √a, x² - 3x + 7 = 0
    √b = 3 - √a = (3 -/+ i√19)/2, b = (- 5 -/+ 3i√19)/2
    Answer check:
    a + 3√a + 7 = (- 5 ± 3i√19)/2 - 3[(3 ± i√19)/2] + 7 = - 14/2 + 7 = 0; Confirmed
    √a + √b = (3 ± i√19)/2 + (3 -/+ i√19)/2 = 3; Confirmed

  • @Марія-75
    @Марія-75 Місяць тому +1

    Спасибт за науку