Câu hỏi
Cho hai tập hợp \(A = \left\{ {x \in \mathbb{R}\left| {2{x^2} - 3x + 1 = 0} \right.} \right\},B = \left\{ {x \in {\mathbb{N}^*}\left| {3x - 2 < 10} \right.} \right\}\), khi đó:
A
\(A\backslash B = \left\{ {\frac{1}{2};\,\,1;\,\,2;\,\,3} \right\}\);
B
\(A\backslash B = \left\{ {\frac{1}{2};\,\,1} \right\}\);
C
\(A\backslash B = \left\{ {\frac{1}{2}} \right\}\);
D
\(A\backslash B = \left\{ {2;\,\,3} \right\}\).