the mean of first n natural number is 5n/9.then n is:
Danswrang11:
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the mean of first n natural numbers is (n+1)÷2
(n+1)÷2=5n÷9,
10n=9n+9,
n=9
so the answer of the question is n=9
(n+1)÷2=5n÷9,
10n=9n+9,
n=9
so the answer of the question is n=9
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