No.1 middle school ,my love !
预学2:不等式的性质 (1)对称性:a>b⇔bb,b>c⇒a>c. (3)相加性:a>b⇔a+c>b+c. (4)相乘性:a>b,c>0⇒ac>bc;a>b,c<0⇒acb>0⇒an>bn(n∈N,n≥2). (6)开方:a>b>0⇒ 𝐧 𝐚 > 𝐧 𝐛 (n∈N,n≥2).