Question

If x log, (bc), y = log, (ca), z = log (ab), then which of
the following is equal to 1
(1) x+y+z
(2)(1+x)-' +(1+y)-'+(1+z)
(3)xyz
(4) x+y-​

Answer 1

Answer:

(1+x)-'+(1+y)-'+(1+z)