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3 years ago

Which of the following represents 8

Mathematics

2 answers:

aniked [119]3 years ago

4 0

Hello!

your answer is: A. 8

the other answers contain equations that do not result in 8

B is equal to 36

C is equal to 40,320

I hope this helps, and have a nice day!

irina [24]3 years ago

4 0

Answer:

Step-by-step explanation:

The factorial ! is defined as

n ! = n(n - 1)(n - 2) ... × 3 × 2 × 1, thus

8 ! = 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 → C

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Which of the following is an extraneous solution of (45-3x)^1/2=x-9?

Iteru [2.4K]

Answer:

C. x =3

Step-by-step explanation:

Extraneous solution is that root of a transformed equation that doesn't satisfy the equation in it's original form because it was excluded from the domain of the original equation.

Let's solve the equation first

$\sqrt{45-3x} = x-9\\Taking\ square\ on\ both\ sides\\{(\sqrt{45-3x})}^2 = {(x-9)}^2\\45-3x = x^2-18x+81\\0 = x^2-18x+81-45+3x\\x^2-15x+36 = 0\\x^2-12x-3x+36 = 0\\x(x-12)-3(x-12) = 0\\(x-3)(x-12)\\x-3 = 0\\=> x =3\\x-12 = 0\\x = 12\\We\ will\ check\ the\ solutions\ one\ by\ one\\So,\\for\ x=3\\\sqrt{45-3(3)} = 3-9\\\sqrt{45-9} = -6\\\sqrt{36}= -6\\6\neq -6\\For x=12\\\sqrt{45-3(12)} = 12-9\\\sqrt{45-36} = 6\\\sqrt{36}= 6\\6=6$

Hence, we can conclude that x=3 is an extraneous solution of the equation ..

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3 years ago

Which of the following represents 8​

Which of the following represents 8