MHB What is the Sum of Two Sixth Powers?

  • Thread starter Thread starter Albert1
  • Start date Start date
  • Tags Tags
    Root
AI Thread Summary
The discussion revolves around finding the sum of two sixth powers given the equations involving square roots and cube roots of two variables, x and y. By setting variables φ and ψ as the sixth roots of x and y, the equations simplify to φ^3 + ψ^3 = 35 and φ^2 + ψ^2 = 13. The solutions for φ and ψ are determined to be 2 and 3, respectively, leading to φ + ψ = 5. Consequently, the sixth powers of these values yield a final result of x + y = 793. The mathematical approach effectively demonstrates the relationship between the roots and their powers.
Albert1
Messages
1,221
Reaction score
0
$\sqrt {x}+\sqrt {y}=35$

$\sqrt [3]{x}+\sqrt[3] {y}=13$

find x+y
 
Mathematics news on Phys.org
Re: operation of root equation

Albert said:
$\sqrt {x}+\sqrt {y}=35$

$\sqrt [3]{x}+\sqrt[3] {y}=13$

find x+y

Setting $\displaystyle \varphi = x^{\frac{1}{6}}$ and $\displaystyle \psi = y^{\frac{1}{6}}$ You obtain...

$\displaystyle \varphi^{3} + \psi^ {3} = 35$

$\displaystyle \varphi^{2} + \psi^ {2} = 13$ (1)

... and the (1) has solutions $\displaystyle \varphi=2\ \psi= 3$ and $\displaystyle \varphi=3\ \psi= 2$ so that is in any case $\displaystyle \varphi + \psi = 5$... Kind regards

$\chi$ $\sigma$
 
Re: operation of root equation

Setting $\chi = \varphi^6$ and $\sigma = \psi^6$, we get $\chi + \sigma = \varphi^6 + \psi^6 = 2^6 + 3^6 = 793$.

Kind regards,

$\text{I}\Lambda\Sigma$
 
Suppose ,instead of the usual x,y coordinate system with an I basis vector along the x -axis and a corresponding j basis vector along the y-axis we instead have a different pair of basis vectors ,call them e and f along their respective axes. I have seen that this is an important subject in maths My question is what physical applications does such a model apply to? I am asking here because I have devoted quite a lot of time in the past to understanding convectors and the dual...
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
Back
Top