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3 years ago

14

Hi how to solve this question n(n+1)2; where n=9

2 answers:

PolarNik [594]3 years ago

6 0

.

Answer:

2×9(9+1)

18(10)

.180.

Sindrei [870]3 years ago

3 0

Answer:180

Step-by-step explanation:

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