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Tìm ĐK để bt có chứa căn thức có nghĩa Tìm x để các bt sau có nghĩa: a)3√x-1 b) √ 5-2x c)√ x mũ 2+3 d)√-5x e)√3(2x-2) f) √x-3/4 g)√-3/x-2 h)1/√1-3x i)√x mũ 2-4 k)√4x mũ 2-1 l)√3-x/√7x+2 m)√x+3/7-x p)√6x-1+√x+3 q)√x-3/2- √1/x-2 g)1/√2x-x bình
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