One last question !

[allyonline]

(r^-2/[s^5])^3 = r^-6/s^15
text book says answer is :r^6s^15
why are they side by side instead on top of one another ?

 

[wjm11]

(r^-2/[s^5])^3 = r^-6/s^15
text book says answer is :r^6s^15

Are you sure that is what your book says? How about 1/[r^6s^15]?

Notice that r^-6 has changed to r^6. The sign on the exponent changes when the term is moved from the numerator to the denominator (and vice versa).

 

[allyonline]

I'm sure that's what my book says .

 

[mmm4444bot]

The answer in your book is incorrect.

wjm11 posted the correct answer.

All math textbooks contain errors because these books are produced by humans.