Question

B={elN|x=2n,nelN*,n≤5}
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Answer 1

x,n € IN

x=2n

n≤5=> n € [0,5]

deci n €{0,1,2,3,4,5}

x=0×2=0

x=1×2=2

x=2×2=4

x=2×3=6

x=2×4=8

x=2×5=10

deci astea sunt valorile pe care le poate lua x, nr natural!!

=>x€{0,2,4,6,8,10}

B={0,2,4,6,8,10}