Question

The number of points on the real line where the function f(x)-log- Ix-3) is not defined is `f(x) = log_(|x^2-1|)|x-3|` is not defined is
A. 4
B. 5
C. 6
D. 7

Answer 1

Correct Answer - C
`log_(|x^(2)-1|)|x-3|` is defined when `x-3ne0` and `|x^(2)-1|gt0` and `|x^(2)-1|ne1.`
`rArr" "xne3,`
`x^(2)-1ne0" i.e., "xne1or-1,`
`|x^(2)-11ne1" "rArr xne-sqrt2 or sqrt2, and xne0`
Hence, the points at which the function is not defined are
`x=0, 1,-1,sqrt2,-sqrt2,3.`