Question

已知A={x|1/32≤2的-x次方≤4},B={x|x²-3mx+2m²-m²-1

Answer 1

(1)A={x|1/32≤2的-x次方≤4}1/32≤2的-x次方≤42^(-5)≤2^(-x)≤2^2∴-5≤-x≤2∴A=[-2,5]∵x∈N∴A={0,1,2,3,4,5}A的非空真子集的个数为2^6-1=63(2)若A包含于B,则A是B的子集,B={x|x²-3mx+2m²-m-1...