Table 3
Interval
Test Number
Value of \(\dfrac{{1}+{x}}{{1}-{x}}\)
Sign of \(\dfrac{{1}+{x}}{{1}-{x}}\)
\(( {-\infty ,-1})\)
\({-2}\)
\({-}\dfrac{1}{3}\)
Negative
\(( -{1,1})\)
\({0}\)
\({1}\)
Positive
\(( 1{,\infty })\)
\({2}\)
\(-3\)
Negative