Số số hạng của dãy số là:

10-0+1=11(số)

Tổng của dãy số là: \(\left(10+0\right)\times\frac{11}{2}=10\times\frac{11}{2}=5\times11=55\)

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55

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9+9+9+9+9+9+9+9+9+9+9+8+8+8\(9+9+9+9+9+9+9+9+9+9+9+9++9+9+9+9=\)

vào 65%20F%92%F.google.com.exe.67%56F% là biết

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=59