Question

x&lt;b" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-block; float:none; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_SVG">b<1,25

x" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-block; float:none; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_SVG"> là số tự nhiên.