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3 years ago

An arithmetic sequence has this recursive formula:

Mathematics

1 answer:

Marianna [84]3 years ago

5 0

Answer:

Option D is the correct option.

please see the attached picture for full solution..

Hope it helps...

Good luck on your assignment...

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C. Make n subject of the formula S= n/2 [2a + (n - 1)d] please provide your working out

yKpoI14uk [10]

Answer:

$n=\frac{4as -2ds}{(1-2ds)}$

Step-by-step explanation:

$S= \frac{n}{2 [2a + (n - 1)d]}$

Simplifying the fraction by multiplying d into the (n-1) term,

$s=\frac{n}{2 [2a + (n - 1)d] } = \frac{n}{2[2a + dn - d] }$

Simplifying the fraction by multiplying 2 throughout,

$s= \frac{n}{4a + 2dn-2d}$

Multiply $(4a + 2dn-2d)$ on both sides

$(4a + 2dn-2d)s= \frac{n}{4a + 2dn-2d} (4a + 2dn-2d)$

Cancel the $(4a + 2dn-2d)$ on the right hand side

$(4a + 2dn-2d)s= n$

Multiply s to the terms,

$4as + 2dns-2ds= n$

Move $2dns$ to the right hand side by subtracting $2dns$ on both sides $4as + 2dns-2ds-2dns= n-2dns$

$4as -2ds= n-2dns$

On the right hand side of the equation, take out $n$

$4as -2ds= n(1-2ds)$

Divide Left hand side by $(1-2ds)$ ,

$n=\frac{4as -2ds}{(1-2ds)}$

6 0

3 years ago

Write 2x-10=6 in a math problem

mojhsa [17]

Just write a equation then plus 10 on each side, then it will be 2x=16 and then find x, so it will be 8 because 2 times 8 equal 16

7 0

3 years ago

Read 2 more answers

⦁ Find the distance between the two numbers

Sedaia [141]

The distance bewtween -12 and 19 is 31

and -2 -7 is 5

and then 25 and -1 is 26

3 0

3 years ago

9 cm

lions [1.4K]

Answer:

I think it's 149cm

Step-by-step explanation:

I just doubled the numbers and multiplied them

7 0

2 years ago

4a-3(a-2)=2(3a-2) How do you do this?

Alexxandr [17]

Answer:

a=2

Step-by-step explanation:

4a-3(a-2)=2(3a-2)

4a-3a+6=a-4

a+6=6a-4

a-6a=-4-6

-5a=-10

divide both sides by -5

a=2

7 0

3 years ago