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reyrey216
29.07.2019 •
Mathematics
The nth term of the sequence -2, 1, 4, 7, is given by the formula a) an = n - 3 b) an = 3n - 3 c) an = n - 5 d) an = 3n - 5
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Ответ:
The formula to find
where
The formula to find
where
- For
- For
Since
Now we are going to use the explicit formula of an arithmetic sequence
where
We know that
We can conclude that the correct answer is D)an = 3n - 5
Ответ:
The probability for getting a head and an even number is 0.25.
Step-by-step explanation:
S be the sample space of the event = { (H,1) ,(H,2) ,(H,3) ,(H,4) ,(H,5) ,(H,6) ,(T,1) ,(T,2) ,(T,3) ,(T,4) ,(T,5) ,(T,6) }
∴ n(S) = 12
Let A be the event getting a head and an even number when a coin is tossed and a six sided dice is rolled