MHB Can Exponent Values Be Determined with One Equation and Two Variables?

  • Thread starter Thread starter karush
  • Start date Start date
  • Tags Tags
    Exponent
AI Thread Summary
The discussion centers on determining exponent values using a single equation with two variables. It establishes that from the equation $(3^{3v})(27^w)= 81^{12}$, one can derive that $v + w = 16$. The conversation emphasizes that while there is only one equation, it does not require solving for individual values of v and w. Additionally, it calculates the average of v, w, and 35, resulting in 17. The conclusion reinforces that the problem can be approached without needing to find specific values for v and w.
karush
Gold Member
MHB
Messages
3,240
Reaction score
5
Screenshot 2020-11-07 at 1.32.32 PM.png

ok without any calculation I felt it could not be determined since we have one equation with 2 variables
 
Mathematics news on Phys.org
$27= 3^3$ and $81= 3^4$ so $(3^{3v})(27^w)= 81^{12}$
is $3^{3v}(3^{3w})= (3^4)^12$
$3^{3v+ 3w}= 3^{48}$.

$3v+ 3w= 48$ so $v+ w= 16$.

Yes, we have only one equation for v and w but the question does not ask us to solve for v and w.

The average of v, w, and 35 is $\frac{v+ w+ 35}{3}= \frac{16+ 35}{3}= \frac{51}{3}= 17$.
 
helps to write it out rather than quickly assume things
 
Country Boy said:
$27= 3^3$ and $81= 3^4$ so $(3^{3v})(27^w)= 81^{12}$
is $3^{3v}(3^{3w})= (3^4)^12$
$3^{3v+ 3w}= 3^{48}$.

$3v+ 3w= 48$ so $v+ w= 16$.

Yes, we have only one equation for v and w but the question does not ask us to solve for v and w.

The average of v, w, and 35 is $\frac{v+ w+ 35}{3}= \frac{16+ 35}{3}= \frac{51}{3}= 17$.
thank you
 
sorru this was posted earilier
 
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