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Mathematics 8 Online
OpenStudy (anonymous):

Help! Simplify the expression!!

OpenStudy (anonymous):

OpenStudy (anonymous):

i think its 1/15

OpenStudy (diyadiya):

\[\Huge x^{-m} = \frac{1}{x^m}\]

OpenStudy (diyadiya):

\[\Huge 5^{-3}= ?\]

OpenStudy (anonymous):

-125

OpenStudy (diyadiya):

how?

OpenStudy (anonymous):

um well 5*5=25 25*3=75...woops nvm i don't know

OpenStudy (diyadiya):

\[\Huge x^{-m}= \frac{1}{x^m}\] so \[\Huge 5^{-3}= ?\] here x is 5 & m is 3

OpenStudy (anonymous):

so 1/15

OpenStudy (diyadiya):

how ?

OpenStudy (anonymous):

because 1/ 5^3

OpenStudy (anonymous):

so 1/15

OpenStudy (diyadiya):

what is 5^3 ?

OpenStudy (anonymous):

5 to the 3rd power

OpenStudy (anonymous):

5^2=(5*5)=25 , 5^3=5*5*5=125

OpenStudy (diyadiya):

5 x 5 x 5 =?

OpenStudy (anonymous):

ohhhhh 1/125

OpenStudy (anonymous):

OpenStudy (anonymous):

\[(X ^{m})^{n}= X ^{m \times n}\]

OpenStudy (anonymous):

Use this relation .....

OpenStudy (anonymous):

its not 1/125 then?

OpenStudy (anonymous):

lol,i'am answering your next question ,the first one is 1/125 is right :)

OpenStudy (anonymous):

ohhh ahaha, its x 9/28

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