Ivy League Schools Aptitude Test Tricks You Should Know || Harvard University Admission Exam || x=?

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  • Опубліковано 29 жов 2024

КОМЕНТАРІ • 11

  • @__Mike137
    @__Mike137 2 місяці тому +1

    27=3^3; 64=4^3; 48=3*4^2; 36=4*3^2 LHS: (3^3x + 4^3x)/(3^x * 4^2x + 3^2x * 4^x) then divide numerator and denominator by 3^3x let a = (4/3)^x --->144a^3 + 144 = 193a^2 + 193a but 193=144+49 -----> 144(a+1)(a^2 - 2a + 1) - 49a (a+1) = 0 then a= -1 (reject) a= 16/9 and a = 9/16 ---> (4/3)^x = 9/16 or 16/9 ---> x = -2 or 2

  • @souzasilva5471
    @souzasilva5471 2 місяці тому +1

    Como descobrir rapidamente que -337 = -256 - 81, uma vez que existem outras parcelas cuja soma é -337 e por outro lado são exatamente esses dois valores é que interessa? (How to quickly find out that -337 = -256 - 81, since there are other installments whose sum is -337 and on the other hand it is exactly these two values ​​that matter?)

  • @musicsubicandcebu1774
    @musicsubicandcebu1774 2 місяці тому

    Strategy: express all four terms on LHS in terms of 3ˣ and 4ˣ, then use substitutions a = 3ˣ and b = 4ˣ.

    • @souzasilva5471
      @souzasilva5471 2 місяці тому

      Que significa LHS?(What does LHS mean?)

    • @ElectricalStorm
      @ElectricalStorm 2 місяці тому +1

      ​@@souzasilva5471 LHS = Left hand side

  • @souzasilva5471
    @souzasilva5471 2 місяці тому

    Porquê essa equação. 2x² -4x + 15 = 0 não é possível resolver por fatoração? (Why this equation. 2x² -4x + 15 = 0 is it not possible to solve by factoring? )

    • @superacademy247
      @superacademy247  2 місяці тому

      How did you arrive there?

    • @souzasilva5471
      @souzasilva5471 2 місяці тому

      @@superacademy247 Essa é uma equação que não tem nada a ver com sua questão. (This is an equation that has nothing to do with your question.)

  • @chriscotton4207
    @chriscotton4207 2 місяці тому

    I suppose my method miisses -2

  • @daredevil_491
    @daredevil_491 2 місяці тому

    I did this in 10th lmao ivy league