Let $x be defined as x+(1/x) for all nonzero integers x. If $x=t, where t is an integer, which of the following is a possible value of t? ($ is a symbol in this case)
Is it d) because with all the other values (when you plug it in) factoring does not work out?
THANK YOU Mike!
It’s D because the only way you get an integer out of is if x = 1 or x = –1. When x = –1, . (When x = 1, , but 2 isn’t an answer choice.)