RiyaTailz3346
19.08.2019 •
Mathematics
Can you with the question c)
i don't get it.
the numerators are an arithmetic sequence with a common difference and the denominators are the geometric sequence which has a common ratio. i don't understand what is the equation.
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Ответ:
From the tone of your question, and the fact that you appear to have solved
part a) and part b), I'm pretty sure that you have no trouble with a plain old
arithmetic sequence or a plain old geometric sequence. So let's look at the
numerator sequence and denominator sequence of c) separately.
Numerators: 1, 4, 7
Arithmetic sequence. General term = 3n - 2
Denominators: 5, 15, 45
Geometric sequence. General term = 5 x 3^(n-1)
(I always had trouble with these.
That one took me almost 15 minutes.)
So now ! Isn't the general term of the fraction sequence just
(3n - 2) / [ 5 x 3^(n-1) ] ?
and the 7th term would be
(3x7 - 2) / (5 x 3⁶) = (21 - 2) / (5 x 729) = 19 / 3,645
Definitely a weird number, but I feel like my approach holds water.
What do you think ?
Ответ:
LOQ is 80
LRQ is 40
LBQ is 40