(1)3x﹣4≥0→x≥4/3
(2)2＋2x/3≥0→x≤﹣3
(1)√(14/35)＝√(2/5)＝√10/5
(2)√52＋2√13＝2√13＋2√13＝4√13
(3)5√24/2﹣3√(2/3)＝5√6﹣√6＝4√6
(4)√3(√12＋5√8)＝√3(2√3＋10√2)＝6＋10√6
(5)√a²√(b/a)＝|a|√(b/a).当a＞0时原式＝√ab,当a＜0时原式＝﹣√ab
(6)5√a²﹣√(4a²)＝5a﹣2a＝3a
(7)√12/√3﹣√6＝2﹣√6
(8)(√m/2＋√n/3)(√m/2﹣√n/3)＝|m|/4﹣|n|/9.当m≥0且n≥0时原式＝m/4﹣n/9,当m≤0且n≤0时原式＝n/9﹣m/4,当m≥0且n≤0时原式＝m/4＋n/9,当m≤0且n≥0时原式＝﹣m/4﹣n/9