f(x) =square root of x - 1/x + 2
Determine values of x for which
1) f(x)= 0
2) f(x) will be a real number.
Thanks in advance
Do you know "if a> b and c is positive then ac> bc. If a> b and c is negative then ac< bc."
If x+ 2 is positive, then multiplying both sides by it gives $\displaystyle x- 1\ge 0$. When is x+ 2 positive?
If x+2 is negative, then multiplying both sides by it gives $\displaystyle x- 1\le 0$. When is x+ 2 negative?