Question

Det. toate numerele naturale de forma :

53x
x14x
3xx
xxx

Answer 1

53x --»x={0,1,2,3,4,...,9}»»530,531,532,533,534,535,536,537,538,539
x14x --»x={1,2,3,...,9}»»1141,1142,...,1149
3xx --»x={0,1,2,3,...,9}»»300,311,...,399
xxx --»x={1,2,3,...,9}»»111,222,...,999

Answer 2

53x
x€{0,1,2,3,4,5,6,7,8,9}
x14x - x e aceasi numar deci incepe de la unu
x€{1,2,3,4,5,6,7,8,9}
3xx
x€{0,1,2,3,4,5,6,7,8,9}
xxx
x€{,1,2,3,4,5,6,7,8,9}

53x------ 530,531,532,533,534........539
x14x------ 1141,2142.......9149
3xx--------300,311...........399
xxx------ 111,222..........999

Sper ca te-am ajutat