95.6k views
1 vote
Question~


\frac{1}{1 + x {}^((b - a) ) + x {}^((c - a)) } + \frac{1}{1 + x {}^((a - b)) + {x}^((c - b)) } + \frac{1}{1 + {x}^((b - c)) + x {}^((a - c) ) } = ?

A.0

B.1

C.x^(a-b-c)

D.None \: of \: these
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Thanks for answering~~~~~~~~~~~~~~~~​

User Keltar
by
8.5k points

1 Answer

3 votes

Answer:

  • B. 1

Explanation:

Multiply the first term by
x^a, the second term by
x^b, the third term by
x^c.

The first term becomes:


  • x^a/(x^a+x^b+x^c)

The second term becomes:


  • x^b/(x^a+x^b+x^c)

The third term becomes:


  • x^c/(x^a+x^b+x^c)

Their sum is:


  • (x^a+x^b+x^c)/(x^a+x^b+x^c) = 1

Correct choice is B

User Osama Sayed
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories