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noobgirlaskthequest
05.07.2020 •
Mathematics
4) Before mandatory school closures, memes about how tough teaching is/how we
should appreciate teachers were limited. Since "Operation Home School" was forced
to begin, the numbers double daily. If there are 102,400 memes after 12 days, how
many were there originally?
Solved
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Ответ:
Initially, there were 50 memes.
Step-by-step explanation:
It is given that the number doubles daily.
Let the initial number = a
On 2nd day, the number = 2a
On 3rd day, the number = 2
2a
On 4th day, the number = 2
2
2a
and so on..
If we look closely, it is a Geometric Progression with
First term = a and
The common ratio, r = 2
Also, it is given that, 12th term:
nth term of a GP is given as:
So,
Hence, the answer is, the initial number is 50.
Ответ: