设全集I={0,1,2,3},A={x∈I|x 2 +mx=0},若 A={1,2},则实数m= A.3 B.-3 C.
1个回答
B
因为I={0,1,2,3},
A={1,2},所以A={0,3},又因为x(x+m)=0,所以m=-3.
相关问题
设全集I={0,1,2,3,4},集合A={0,1,2,3},集合B={2,3,4},则(C I A)∪(C I B)等
设全集I={0,1,2,3},集合A={0,1,2},集合B={2,3},则∁ I A∪∁ I B等于( ) A.{0
设U={0,1,2,3},A={x属于U|x2+mx=0},若CRB(补集)={1,2},则实数m=
设全集I={2,3,a2+2a-3},A={2,|a+1|},CuA={5},M={x|x=0.5|a|},求集合m的所
设全集I={2,3,a2+2a-3},A={2,|a+1|},∁IA={5},M={x|x=log2|a|},则集合M的
若z=1+i,且(x+z)4=a0x4+a1x3+a2x2+a3x+a4,(ai∈C,i=0,1,2,3,4)则a2=_
设U={0,1,2,3},A={x∈U|x2+mx=0},CUA={1,2},则实数m的值为( )
设全集U=R,集A={x|﹣1≤x≤2},B={x|0<x<4},C={x|2a<x<a+3} 若A∩C=∅
设集合A={x|x^2-3x+2=0}B={x|x^2-ax+a-1=0}C={x|x^2-mx+2=0}若B包含于A
设集合A={x|x∧2+3x-4=0},B={x|ax-1=0},若A∩B=B,则实数a=