用列举法表示集合{x∈R|(x-1)^2(x+1)=0} {x∈N|6/(6-x)∈N {2,4,6,8} {1,1/2,1/3,1/4}用列举法表示集合{x∈R|(x-1)^2(x+1)=0}{x∈N|6/(6-x)∈N{2,4,6,8}{1,1/2,1/3,1/4}后面两个是描述法
问题描述:
用列举法表示集合{x∈R|(x-1)^2(x+1)=0} {x∈N|6/(6-x)∈N {2,4,6,8} {1,1/2,1/3,1/4}
用列举法表示集合{x∈R|(x-1)^2(x+1)=0}
{x∈N|6/(6-x)∈N
{2,4,6,8}
{1,1/2,1/3,1/4}
后面两个是描述法
答
{x∈R|(x-1)^2(x+1)=0} = { -1, 1}
{x∈N|6/(6-x)∈N } = {3,4,5 }
{2,4,6,8}
答
{x∈R|(x-1)^2(x+1)=0} = { -1,1}
{x∈N|6/(6-x)∈N } = {3,4,5 }
{2,4,6,8}
{1,1/2,1/3,1/4}