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2 years ago

Make b the subject a= 1/4 b

Mathematics

2 answers:

11Alexandr11 [23.1K]2 years ago

4 0

4ab=1
b=1/4x
so answer is b=1/4x

dalvyx [7]2 years ago

3 0

Answer:

b = 4a

Step-by-step explanation:

$a = \frac{b}{4}$

$b = 4a$

changing sides changes sign division to multiplication.

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− 6/b −50=-49 what is b

Sedbober [7]

Answer:

-6

Step-by-step explanation:

-6/b-50=-49

step1;collect like terms

-6/b=-49+50

-6/b=1

step2;cross multiply

-6/b=1

-6=1b(1b can also be regarded as b)

b=-6

6 0

3 years ago

Need help! much appreciated

Volgvan

Answer:

C-D = 6

A-B = 3.25

D = 118

Step-by-step explanation:

C-D = 6 because the line is the same as B-C

A-B = 3.25 because the line is the same as A-D

D = 118 because the angle of B is vertically opposite to D

7 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

ILL BRAINLIEST YOU IF YOU GET IT RIGHT please explanation

Anastaziya [24]

Answer:

I thinks

Step-by-step explanation:

8 0

2 years ago

-21 <-5n-2n solve for n

Ray Of Light [21]

Answer:

Step-by-step explanation:

hsebhqejfqhjdbfkegfoyhadhof

6 0

3 years ago