Find all values of x algebraically for which the algebraic expression is not defined. X/x-16

Answer 1

ASSUMING you mean x/(x-16)

denominator cannot be zero

x-16 = 0

x = 16

function is undefined at x = 16

domain is all reals except 16

(-infinity,16) U (16, infinity)

R - {16}

without the parenthesis, the function

as written becomes -15

Answer 2

I presume that the expression is x/(x-16) . If that is the case the expression will be undefined when the denominator is 0 that is when x = 16