Question

The solution set of $(x-1{)}^{99}(x+1{)}^{100}\le 0$ is

• A. $(-\infty ,1]$
• B. $(-1,1)$
• C. $(1,\infty )$
• D. $(-\infty ,-1)$

Answer 1

The correct option is A $(-\infty ,1]$

$(x-1{)}^{99}(x+1{)}^{100}\le 0$


$\therefore x\in (-\infty ,1]$