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Todos Numeros de 4 cifras
9999- 999= 9000;
mayores que 3400
9999- 3400=6500
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abcd --4 cifras
A= 3,4,5,6,7,8,9 = 7 cifras;
b= 4,5,6,7,8,9 = 6 cifras
C= 0,1,2,3,4,5,6,7,8,9 = 10 cifras
D=0,1,2,3,4,5,6,7,8,9 = 10 cifras
(menos 1 numero ---3400)
Todos numeros = 7• 6• 10• 10 -1 = 4200-1= 4199.
Respuesta: son 4199 numeros mayoress que 3400 se pueden formar dede el 0 al 9.