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Mathematics 22 Online
OpenStudy (anonymous):

simplify

OpenStudy (anonymous):

what are we to simplify?

OpenStudy (anonymous):

\[\frac{ e ^{x} e ^{3y} e ^{4z} }{ e ^{\frac{ x }{ x+3y }} }\]

OpenStudy (anonymous):

^ that

OpenStudy (anonymous):

oops it should be e^(x/2-4y)

OpenStudy (anonymous):

For the numerator, you add exponents, since e^x (e^y) = e^(x+y). so the numerator is e^(x+3y+4z). Now you have the numerator (e^(x+3y+4x)) divided by e^ a power. Now use the other Law of Exponents, that e^x divided by e^y = e^(x-y). so you will have e^(x+3y+4z) divided by the denominator...just subtract the top exponent - the denominatpr's exponent.

OpenStudy (anonymous):

x^2 +3x+4xz -2 +4y?

OpenStudy (anonymous):

3xy*

OpenStudy (anonymous):

I dont have pen/pencil here. I cant check that last step.

OpenStudy (anonymous):

i basically did x(x+3y+4z) -(2-4y)

OpenStudy (anonymous):

Doing this in my head, you should get [(x+3y)(x+3y+4z) - z] / (x+3y).

OpenStudy (anonymous):

hmm..

OpenStudy (anonymous):

can u show me the steps?

OpenStudy (anonymous):

If I read the fraction in the denominator correctly, it reads (z/(x+3y))

OpenStudy (anonymous):

o sorry, its x/2-4y

OpenStudy (anonymous):

oh, let me do this again

OpenStudy (anonymous):

Is that what it says in the denominator of your original question???

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

I thought it reads e^(z/(x+3y))?

OpenStudy (anonymous):

nope its e^(x/(2-4y))

OpenStudy (anonymous):

ok..let me see what I get

OpenStudy (anonymous):

You should have for a final answer: e^[(x+3y+4z)(2-4y)-x/(2-4y)]

OpenStudy (anonymous):

Only the 2-4y is in the denominator; everything else is in the numerator

OpenStudy (anonymous):

how come (2-4y) is in the numerator and denominator?

OpenStudy (anonymous):

because you are subtracting 2 fractions..the LCD is (2-4y)

OpenStudy (anonymous):

|dw:1384129490968:dw|

OpenStudy (anonymous):

Look at my subtraction of the two fractions. LCD = 2-4y.

OpenStudy (anonymous):

o ya.. right.. thx

OpenStudy (anonymous):

Welcome.

OpenStudy (anonymous):

im sorry but the answer is wrong, i inserted the answer into the program, which asks me the question, and it told me its wrong.

OpenStudy (anonymous):

If I read the variables correctly, the answer is correct. If you want to enlarge the problem to make certain that I made no error in any of the variables, feel free to write back.

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