Question

Fie A={0,1,3} si B ={x/x=2^a si a € A} Scrieti elementele multimii B si calculati card B

Answer 1

A={0,1,3} si B ={x/x=2^a si a ∈ A}

B={2^0, 2^1, 2^3}

B={1, 2, 8}, are 3 elemente

deci, card B=3