求质量!已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0} 是否存在实数a,使得B∩A=A已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0} 是否存在实数a,使得B∩A=A?解题思路是什么?
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![求质量!已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0} 是否存在实数a,使得B∩A=A已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0} 是否存在实数a,使得B∩A=A?解题思路是什么?](/uploads/image/z/4491149-5-9.jpg?t=%E6%B1%82%E8%B4%A8%E9%87%8F%21%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88A%3D%7Bx%7Cx2-3x%2B2%3D0%7D%2CB%3D%7Bx%7Cx2%2B2%28a%2B1%29x%2B%28a2-5%29%3D0%7D+%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E5%AE%9E%E6%95%B0a%2C%E4%BD%BF%E5%BE%97B%E2%88%A9A%3DA%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88A%3D%7Bx%7Cx2-3x%2B2%3D0%7D%2CB%3D%7Bx%7Cx2%2B2%28a%2B1%29x%2B%28a2-5%29%3D0%7D+%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E5%AE%9E%E6%95%B0a%2C%E4%BD%BF%E5%BE%97B%E2%88%A9A%3DA%3F%E8%A7%A3%E9%A2%98%E6%80%9D%E8%B7%AF%E6%98%AF%E4%BB%80%E4%B9%88%3F)
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