Question: La suma digital ( Sd ) se define como la suma de los dgitos que conforman un nmero, es decir Sd (532) = 5 +
La
suma
digital
(
Sd
)
se
define
como
la
suma
de
los
dgitos
que
conforman
un
nmero,
es
decir
Sd
(532) = 5 + 3 + 2 = 10
Sd
(20) = 2+ 0 = 2
Sd
(111) = 1 + 1 +1 = 3
Segn
la
anterior
informacin,
si
se
desea
conocer
la
cantidad
de
nmeros
cuya
suma
digital
(
Sd
)
sea
9
,es
correcto
afirmar
que
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