已知2分之x=3分之y=5分之z(xyz≠0)则x分之x+2y+3z得值是如题
问题描述:
已知2分之x=3分之y=5分之z(xyz≠0)则x分之x+2y+3z得值是如题
答
设x/2 = y/3 = z/5 = k x = 2k,y = 3k,z = 5k (x+2y+3z)/x = (2k + 6k + 15k)/2k= 23/2
已知2分之x=3分之y=5分之z(xyz≠0)则x分之x+2y+3z得值是如题
设x/2 = y/3 = z/5 = k x = 2k,y = 3k,z = 5k (x+2y+3z)/x = (2k + 6k + 15k)/2k= 23/2