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issagirl05
29.09.2019 •
Mathematics
For the sequence given recursively by ak = 2ak-1 - 3 for k > 2, where a1 = 4, someone has guessed a closed form and used the predicate r(n) for the statement "an = 2^n-1 +3." an = 23. oro s (a) are r(1), r(2), r(3), and r(4) true?
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Ответ:
True
Step-by-step explanation:
Given that recurrence formula is
From this we can find
Let us check now R's for these numbers
R(1) is trivially true
We find that these matches with a values we found using recurrence formula
Hence we can say that R(1), R(2), R(3), and R(4) are true
Ответ:
The answer is 500
Step-by-step explanation: