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How to simplify and Solve the Variable ‘M’ in this Algebraic Exponential Equation? 

Professor_1o1
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31 окт 2024

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Комментарии : 17   
@SGuerra
@SGuerra 18 дней назад
A questão é bem bonita. Parabéns! Se 3^m - 2^m = 65, então 3^m = 65 + 2^m e daí 3^m > 65. Assim m = 4. Da mesma maneira é possível majorar 2^m para a obtenção de um único m. Brasil.
@professor_1o1
@professor_1o1 18 дней назад
Yes well said 👍🏽. Thanks 🙏🏽
@YAWTon
@YAWTon 18 дней назад
No calculation needed, the answer m=4 is obvious, and since 3*m-2*m
@professor_1o1
@professor_1o1 18 дней назад
@@YAWTon well that is true, but finding ways to solve equations like these, you got to admit it’s pretty awesome !
@YAWTon
@YAWTon 18 дней назад
@@professor_1o1 Yes I find it awesome to find ways to solve equations. However, I do not find the method that you use in the clip particularly awesome. The solution m=4 in this example is too obvious, and I would not even start to think about a strategy to solve the problem through algebraic means. But more importantly: your approach has worked in this case, but this is more or less by accident. Interestingly, you did not give a justification for factoring 65 as 5*15. Obviously, you chose the factors 5 and 13 because you knew that they would lead to the solution m=4. Try to use your method on the problem 3^m-2^m=211. Again, the solution m=5 is pretty obvious (m must be at leas 5, and 3^5-2^5=243-32=211). Applying the method from your clip, one has to find x,y such that x^2-y^2=211. But in this case, the factors ar not integer factors of 211, but irrational numbers x=9√3 and y=4√2.☹
@Bazzmonkey
@Bazzmonkey 18 дней назад
@@professor_1o1this is my calculation: 3^m-2^m= 65, 3-2= 1, so 1=65*2m^2,1-2m^2=65, 2m^2=64, 2m=8, so m=4. Am i correct or nah?
@professor_1o1
@professor_1o1 18 дней назад
@@Bazzmonkey nah, you can’t subtract with terms with unknown terms like that, and there are other errors as well, but not good true
@astritsheshi5187
@astritsheshi5187 18 дней назад
M=4
@elizandadingle9503
@elizandadingle9503 21 день назад
Why did you choose 2/2 specifically? Could you have chosen like 3/3 or 4/4 instead?
@osabossa
@osabossa 21 день назад
He chose 2/2 to have square and 1/2 was a byproduct of this. You could do 3/3, but x^3-y^3=65 would be a hustle
@professor_1o1
@professor_1o1 21 день назад
@@osabossa excellent 👏🏼
@professor_1o1
@professor_1o1 21 день назад
@@elizandadingle9503 Yes you can use other equivalents of 1. However the greater the power is the more working for the solution.
@dumitrudraghia5289
@dumitrudraghia5289 19 дней назад
m=1, X. m=2, X. m=3, X. m=4. VV
@michaelweiske702
@michaelweiske702 19 дней назад
Before watching the video: 3^m = log(3)m = ln(m)/ln(3) 2^m = log(2)m = ln(m)/ln(2) ln(m)/ln(3) - ln(m)/ln(2) = 65 ln(m)*(1/ln(3) - 1/ln(2)) = 65 ln(m) = 65/(1/ln(3) - 1/ln(2)) m = e^(65/(1/ln(3) - 1/ln(2))) = 9.619*10^-54 Plugging in for m, I get 0. Not sure what I did wrong here.
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