Question

comparati card A cu card B, daca; a) A={x€N|2<sau egalx<7} B={x€N|4<x<sau egal12} b)A={8,10,12...100} B={7,9,11...99}​

Answer 1

a) A={2,3,4,5,6}

B={5,6,7,8,9,10,11,12}

card A< card B

b) a1=8, an=100, r=10-8=2

an=a1+(n-1)×r

100=8+(n-1)×2

n-1=(100-8):2

n-1=46

n=47

card A=47

a1=7, an=99, r=9-7=2

99=7+(n-1)×2

n-1=(99-7):2

n-1=47

n=48

card B=48

card A< card B