Question

Determinati elementele multimilor; B={xlx∈N*,x<8,x-par} ,C={yly∈N,y=3×-²x∈B}

Answer 1

B={ 2,4,6}

y=3^(x-2)-x
x=2 => y= 3^0= 1
x=4 => y= 3²-4 = 5
x=6 => y= 3^4-6 = 75
=> C={1,5,75}