In which expression should the exponents be subtracted?

(610)-7

2^9/5^9

(-1/2)^11 x (-1/2)^-4

3^8/3^5

Question

In which expression should the exponents be subtracted?

 (610)-7

 2^9/5^9

(-1/2)^11 x (-1/2)^-4

3^8/3^5

anonymous · Answer

well, B and D are out cuz they are the same.

anonymous · Answer

C

solomonzelman · Answer

fathomboy, what are you talking about ???

when you divide you subtract exponents, so it is either B or D.

Now... i can NOT be B, b/c the numbers divided are not the same, so you can't subtract... therefore, it is D.

anonymous · Answer

-_- @SolomonZelman im sorry, yea i admit i flopped on this one, thanks for telling me :) (no sarcasm)

solomonzelman · Answer

$\Huge\color{blue}{ \bf     \frac{3^{8} }{3^{5} }	 }$


$\LARGE\color{blue}{ \bf    3^{8} \div  3^{5} 	 }$


$\LARGE\color{blue}{ \bf    3^{8-5} 	 }$

$\LARGE\color{blue}{ \bf    3^{3} 	 }$

this is how it's done.

solomonzelman · Answer

it's alright :)