Question

5. Elementele mulțimii {xeN x = 2n+1, neN, x < 8 sunt: a) 3,5,7) b) {1,3,5,7) c) {0,1,3,57 d) 0,3,5,7)​

Answer 1

Răspuns:

{x€N,x=2n+1,n€N x<8}

x=2n+1,x<8

x=2×0+1-》1

x=2×1+1-》3

x=2×2+1-》5

x=2×3+1-》7

X={1,3,5,7}

Succes!