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Mathematics 24 Online
OpenStudy (anonymous):

i need someone to check my work. question posted below

OpenStudy (anonymous):

OpenStudy (anonymous):

what did you get?

OpenStudy (anonymous):

i got \[4^{2}\]

OpenStudy (anonymous):

close... lets start with the top: whats 4^3*4^4

OpenStudy (anonymous):

\[4^{7}\]

OpenStudy (anonymous):

perfect, now divide that by 4^9

OpenStudy (anonymous):

you subtract it not divide it dont you

OpenStudy (anonymous):

well you divide the expression; but you get you answer my subtracting the exponents

OpenStudy (anonymous):

you subtract 9 from 7 and then you cant have a negative exponent on the top so you bring it to the bottom by putting a 1 ove the \[4^{2}\] so it becomes \[\frac{ 1 }{ 4^{2} } or just 4^{2}\]

OpenStudy (anonymous):

no, thats fine' you should have 4^-2

OpenStudy (anonymous):

thats not even an answer

OpenStudy (anonymous):

\[4^{-2}=\frac{ 1 }{ 4^2? }\]

OpenStudy (anonymous):

yes because by putting it from the top to the bottom or vise versa it changes it from a negative exponent to a positive

OpenStudy (anonymous):

yup

OpenStudy (anonymous):

you can simplify 1 over 4 squared to just 4 squared

OpenStudy (anonymous):

afraid not

OpenStudy (anonymous):

think about it 4^2 is 16

OpenStudy (anonymous):

but 1/4^2 is 1/16

OpenStudy (anonymous):

so is 1 over 4^2

OpenStudy (anonymous):

yes it is

OpenStudy (anonymous):

okay so if your simplifying it you could just say 4^2

OpenStudy (anonymous):

right

OpenStudy (anonymous):

nope, thats like saying 1/2 is the same as 2

OpenStudy (anonymous):

ohhhh

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