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3 years ago

How do you do this question?

Mathematics

1 answer:

Troyanec [42]3 years ago

8 0

Answer:

Step-by-step explanation:

The question is a bit ambiguous. Are A B C D and F positive? It says they are prime which is good. I'm going to assume that they are all > 0 but that may not be a valid assumption. I'm not sure that numbers < 0 cannot be prime. Looking it up, I find that the assumption is correct. If they are prime, they are greater than 0.

That says quite a bit.

The factors of f are 1 and f.

The first one is possible x + 1 could be a factor because it will come x = - 1

x + f could be a factor.

Because you will push through x = - f

The only 2 I can guarantee are the two I have given. Even though I have given 2, and someone else came along and gave a different answer, I would defer to what they said.

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3 years ago

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Butoxors [25]

Answer: Yes it is reasonable.

Step-by-step explanation:

If all the numbers are rounded, 79 will be rounded to 80

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3 years ago

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OverLord2011 [107]

its b

Step-by-step explanation:

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2 years ago

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When the effective interest rate is 9% per annum, what is the present value of a series of 50 annual payments that start at $100

ser-zykov [4K]

Answer:

$1,109.62

Step-by-step explanation:

Let's first compute the future value FV.

In order to see the rule of formation, let's see the value (in $) for the first few years

End of year 0

1,000

End of year 1(capital + interest + new deposit)

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End of year 2 (capital + interest + new deposit)

(1,000*(1.09)+10)*1.09 +10 =

$\bf 1,000*(1.09)^2+10(1+1.09)$

End of year 3 (capital + interest + new deposit)

$\bf (1,000*(1.09)^2+10(1+1.09))(1.09)+10=\\1,000*(1.09)^3+10(1+1.09+1.09^2)$

and we can see that at the end of year 50, the future value is

$\bf FV=1,000*(1.09)^{50}+10(1+1.09+(1.09)^2+...+(1.09)^{49}$

The sum

$\bf 1+1.09+(1.09)^2+...+(1.09)^{49}$

is the sum of a geometric sequence with common ratio 1.09 and is equal to

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$\bf FV=1,000*(1.09)^{50}+10*815.08356=82,508.35564$

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$\bf PV=\frac{FV}{(1.09)^{50}}=\frac{82508.35564}{74.35572}=1,109.616829\approx \$1,109.62$

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