Oblicz sume:
a)9+99+999+...+999999999
b)3+33+333+...+333333333
mysle,ze o to chodzi........
9+99+999+9999+99999+999999+9999999+99999999+999999999=1111111101
ten sam sposob
3+33+333...............................................................=370370367
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mysle,ze o to chodzi........
9+99+999+9999+99999+999999+9999999+99999999+999999999=1111111101
ten sam sposob
3+33+333...............................................................=370370367