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polet [3.4K]
2 years ago
10

How many integers n leave remainder 4 when divided by 7, if n satisfies the given inequality?

Mathematics
1 answer:
bekas [8.4K]2 years ago
4 0

Consider inequality |-n| This inequality is equivalent to inequality |n|

This means that -46

The greatest integer number n, such that -46 when dividing by 7 gives the remainder 4 is 39. Then subtract 7, you get 32, then 25 and so on.

When n=-39, -32, -25, -18, -11, -4, 4, 11, 18, 25, 32, 39 then dividing by 7 the remainder is 4.

Answer: 12 integers.

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