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束河古镇到丽江机场有多远搭车要多少时间? 束河古镇和大研古镇有多远
已知x=﹙3+√5﹚/2,求x?-6x3+9x2+5的值 x=﹙3+√5﹚/22x-3=√54x2-12x+9=54x2-12x+4=0x2-3x+1=0x^4?-6x3+9x2+5x2﹙x2-3x+1﹚-3x3+8x2+53x﹙x2-3x...
已知x=﹙3+√5﹚/2,求x?-6x3+9x2+5的值 x=﹙3+√5﹚/22x-3=√54x2-12x+9=54x2-12x+4=0x2-3x+1=0x^4?-6x3+9x2+5x2﹙x2-3x+1﹚-3x3+8x2+53x﹙x2-3x...