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Lelu [443]
2 years ago
5

Evaluate the expression when c=4,d=6 and e=10

Mathematics
1 answer:
natima [27]2 years ago
6 0
Errrmmm.... Where is the expression?
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Find the radius of convergence, r, of the series. ∞ xn 2n − 1 n = 1 r = 1 find the interval, i, of convergence of the series. (e
Bingel [31]
Assuming the series is

\displaystyle\sum_{n\ge1}\frac{x^n}{2n-1}

The series will converge if

\displaystyle\lim_{n\to\infty}\left|\frac{\frac{x^{n+1}}{2(n+1)-1}}{\frac{x^n}{2n-1}}\right|

We have

\displaystyle\lim_{n\to\infty}\left|\frac{\frac{x^{n+1}}{2(n+1)-1}}{\frac{x^n}{2n-1}}\right|=|x|\lim_{n\to\infty}\frac{\frac1{2n+1}}{\frac1{2n-1}}=|x|-\lim_{n\to\infty}\frac{2n-1}{2n+1}=|x|

So the series will certainly converge if -1, but we also need to check the endpoints of the interval.

If x=1, then the series is a scaled harmonic series, which we know diverges.

On the other hand, if x=-1, by the alternating series test we can show that the series converges, since

\left|\dfrac{(-1)^n}{2n-1}\right|=\dfrac1{2n-1}\to0

and is strictly decreasing.

So, the interval of convergence for the series is -1\le x.
6 0
3 years ago
I had $25 and i bought 3 boxes of granola bars. i can home with $4. how much does each box of granola bars cost?
Snezhnost [94]
$25 - $4 = $21
You spent $21 on 3 boxes of granola bars.

3 boxes = $21
1 box = $21 ÷ 3 = $7

One box of granola bar costs $7.
4 0
3 years ago
Read 2 more answers
The difference of 17 and 5 tines a number
emmasim [6.3K]

You can answer this problem in two different ways: the first being (17 - 5) * x, and the second being 12 * x.

6 0
3 years ago
Please help with the answer for 7/9 -1/3=
Levart [38]

Answer:

4/9 is the answer

Hope it correct and it helps

6 0
2 years ago
Read 2 more answers
Besides -10.75+-10.75 what plus what = -21.5?
Butoxors [25]

Answer:

-32.25 + 10.75 = -21.5

Step-by-step explanation:

-10.75 + -10.75  = -21.5

-32.25 + 10.75 = -21.5

5 0
2 years ago
Read 2 more answers
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