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2 years ago

Ans this sum plsss .

Mathematics

1 answer:

FrozenT [24]2 years ago

8 0

Answer:

See below ↓

Step-by-step explanation:

2/5
12/25
3/7
3/8
3/10

Draw a number of spacing 0.25 each
Start from -1 to 1
-2/8 = -0.25 [mark on line]
3/6 = 0.5 [mark on line]

Midpoint of -2/5 and 1/2
M = [-2/5 + 1/2] / 2
M = [1/10] / 2
M = 1/20

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lyudmila [28]

Answer: 120

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Explanation:

We have seven slots to fill. Let's call the slots A, B, C, D, E, F, G

There are 10 choices for slot A

There are 9 choices for slot B

There are 8 choices for slot C

There are 7 choices for slot D

There are 6 choices for slot E

There are 5 choices for slot F

There are 4 choices for slot G

We count down because each previous slot reduces the pool to choose from. Multiply those values out: 10*9*8*7*6*5*4 = 604800

Now divide that result by 5040. Why 5040? Because this is the number of ways to arrange 7 people within a single grouping. Note how 7! = 7*6*5*4*3*2*1 = 5040. W're dividing because order does not matter for any committee.

So we have 604800/5040 = 120 which is the answer we want

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Side note: We could use the alternate route of the nCr combination formula

nCr = (n!)/(r!*(n-r)!)

where n = 10 and r = 7

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Which of the following is 10 times what the 5 represents in 8,145

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Answer:

Step-by-step explanation:

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3 years ago

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grandymaker [24]

Answer:

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Step-by-step explanation:

The given recursive definition is,

$a_n=-6a_{n-1}, a_1=4.5$

This will form a geometric sequence with first term 4.5 and common ratio r=-6.

When n=2, we have:

$a_2=-6a_1 \\ \implies \: a_2=-6 \times 4.5 = - 27$

When n=3, we get:

$a_3=-6a_2 \\ \implies \: a_3=-6 \times - 27 = 162$

When n=4, we get:

$a_4=-6a_3 \\ \implies \: a_4=-6 \times 162 = - 972$

When n=5, we get:

$a_5=-6a_4 \\ \implies \: a_5=-6 \times - 972 = 5832$

Therefore the first five terms are:

4.5, -27, 162,-972, 5832

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Step-by-step explanation:

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Ans this sum plsss . ​

Ans this sum plsss .