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Re: m is different from zero [#permalink]
GreenlightTestPrep wrote:
Carcass wrote:
\(m \neq 0\)

Quantity A
Quantity B
\((\frac{1}{2} + \frac{1}{m}) \times (m+2)\)
\(\frac{(m+2)^2}{2m}\)


A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.


Given:
Quantity A: \((\frac{1}{2} + \frac{1}{m}) \times (m+2)\)

Quantity B: \(\frac{(m+2)^2}{2m}\)



why solve this way when you can simply do addition to the first term and get the same quantity as B?

Is I am missing something here?
Use FOIL to expand and simplify both quantities:
Quantity A: \(\frac{m}{2} + 2 + \frac{2}{m}\)

Quantity B: \(\frac{m^2+4m+4}{2m}\)


Multiply both quantities by 2 to get:
Quantity A: \(m + 4 + \frac{4}{m}\)

Quantity B: \(\frac{m^2+4m+4}{m}\)


USEFUL FRACTION PROPERTY: \(\frac{a+b+c}{d}=\frac{a}{d}+\frac{b}{d}+\frac{c}{d}\)


Apply the above property to Quantity B to get:
Quantity A: \(m + 4 + \frac{4}{m}\)

Quantity B: \(\frac{m^2}{m}+\frac{4m}{m}+\frac{4}{m}\)


Simplify Quantity B to get:
Quantity A: \(m + 4 + \frac{4}{m}\)

Quantity B: \(m+4+\frac{4}{m}\)

Answer: C

Cheers,
Brent
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Re: m is different from zero [#permalink]
Expert Reply
is the quote a question sir ?'
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Re: m is different from zero [#permalink]
1
Carcass wrote:
\(m \neq 0\)

Quantity A
Quantity B
\((\frac{1}{2} + \frac{1}{m}) \times (m+2)\)
\(\frac{(m+2)^2}{2m}\)


A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.


Col. A: \((\frac{1}{2} + \frac{1}{m}) \times (m+2)\)
Col. B: \(\frac{(m+2)^2}{2m}\)

Col. A: \((\frac{m+2}{2m}) \times (m+2)\)
Col. B: \(\frac{(m+2)^2}{2m}\)

Col. A: \(\frac{(m+2)^2}{2m}\)
Col. B: \(\frac{(m+2)^2}{2m}\)

Hence, option C
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m is different from zero [#permalink]
Quantity A

\((\dfrac{1}{2}+\dfrac{1}{m}) \times (m+2)\)

\((\dfrac{m+2}{2m}) \times (m+2)\)

\(\dfrac{(m+2)}{2m} \times (m+2)\)

\(\dfrac{(m+2)^2}{2m}\)

This is same as Quantity B

Therefore, BOTH Quantities are EQUAL

The answer is C
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m is different from zero [#permalink]
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