2 years ago

What is the answer for 3.7-4.2n-3n+8

Mathematics

1 answer:

Romashka-Z-Leto [24]2 years ago

4 0

The Answer:

11.7 - 7.2n

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18 + 4(3x - 7) = -70

Elan Coil [88]

If you’re trying to find the value of x it is -5

4 0

3 years ago

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

Find the quotient 54÷3=

dangina [55]

60/3=20 57/3=19 54/3=18

7 0

3 years ago

Read 2 more answers

What is the solution to the equation?<br> 5х - 18 = 10x - 3

Alex787 [66]

Step-by-step explanation:

if we add 18 to both side then it becomes 5x=10x+15 and if we divide by five, x=2x+3