Applications of algebraic expressions

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SUMMARY

The discussion centers on solving the algebraic expression problem involving the equations ##x + \frac{1}{x} = a##, ##x^{1394} + \frac{1}{x^{1394}} = b##, and ##x^{1396} + \frac{1}{x^{1396}} = c##, with the goal of determining the value of ##x^{1398} + \frac{1}{x^{1398}}##. Participants express varying levels of clarity regarding the solution, with one user suggesting that the relationships between ##a, b, c## indicate the presence of multiple hidden identities. The conversation highlights the need for clearer explanations and structured problem-solving approaches, particularly emphasizing the importance of framing questions effectively.

PREREQUISITES
  • Understanding of algebraic expressions and identities
  • Familiarity with manipulating equations involving exponents
  • Knowledge of quadratic equations and their solutions
  • Ability to analyze relationships between variables in mathematical contexts
NEXT STEPS
  • Research algebraic identities related to powers of sums
  • Study the derivation of expressions involving ##x + \frac{1}{x}##
  • Learn techniques for solving higher-order polynomial equations
  • Explore structured problem-solving methods in algebra
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Students, educators, and mathematicians interested in algebraic problem-solving, particularly those working with expressions involving powers and identities.

MatinSAR
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Homework Statement
If ##x+1/x=a## and ##x^{1394}+\frac {1}{x^{1394}}=b## and ##x^{1396}+\frac {1}{x^{1396}}=c## then what is ##x^{1398}+\frac {1}{x^{1398}}## equal to?
Relevant Equations
Empty.
Hello. This is my answer:
https://up.maralhost.com/imagef-37f78ec7d1bd1-jpg.html
Can someone tell me If I am wrong?

Book's answer:
2023_08_11 11_37 PM Office Lens.jpg
 
Last edited:
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MatinSAR said:
Homework Statement: If ##x+1/x=a## and ##x^{1394}+\frac {1}{x^{1394}}=b## and ##x^{1396}+\frac {1}{x^{1396}}=c## then what is ##x^{1398}+\frac {1}{x^{1398}}## equal to?
Relevant Equations: Empty.

Hello. This is my answer:
View attachment 330406
Can someone tell me If I am wrong?

Book's answer:
View attachment 330408
The book answer appears simple and unimpeachable to me.
 
PeroK said:
The book answer appears simple and unimpeachable to me.
Thanks for your reply.
You were not able to understand my answer(I am sorry it was not clear) or it was compeletly wrong?

More clear explanations and better quality:
https://up.maralhost.com/imagef-37f78ec7d1bd1-jpg.html
 
Last edited:
MatinSAR said:
Thanks for your reply.
You were not able to understand my answer(I am sorry it was not clear) or it was compeletly wrong?

More clear explanations and better quality:
https://up.maralhost.com/imagef-37f78ec7d1bd1-jpg.html
That looks like an alternative. ##a,b,c## are related, so there must be several different identities hidden there.
 
PeroK said:
That looks like an alternative. ##a,b,c## are related, so there must be several different identities hidden there.
Thank you again. For taking time to help me...
I will try to find a link between 2 answers. If it was successful I will inform...
 
PeroK said:
That looks like an alternative. ##a,b,c## are related, so there must be several different identities hidden there.
Yes, it is a poor question. E.g. you could solve the quadratic to find x as a function of a then plug that in.
It should be structured as "show that".
 

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