Help with indices question please?

  • 0 votes

In steps can someone please help me with these;

2^6/3

and

4^-3

Thanks a lot :)

Posted Fri 15th February, 2013 @ 15:29 by :) PurpleJaguar (: - Team GR

5 Answers

  • 1 vote

Are you trying to say..

2 to power of 6 divide by 3 and..

4 to the power of minus 3 

If yes this is how I've been taught to do it..

First Question

1) Calculate the answer of 2 to the power of 6

   this is the same as saying 2x2x2x2x2x2 = 64

2) Then you divide 64 by 3 

3) Giving you an answer of 64/3 or 21.3 recurring

Second Question

1) Calculate what 4 to the power of -3 is

 2) When you have a minus.. you always write it as 1/4 ^3 (The reciprocal) 

3) So you work out what is 4^ 3.. this is 4x4x4 = 64

4) Therefore, the answer would be 1/64

Hope that helps.. sorry if its confusing.. I need the maths symbols. to show you properly

Answered Fri 15th February, 2013 @ 18:13 by ? Secret - Team GR
Edited by ? Secret - Team GR on Fri 15th February, 2013 @ 18:14
  • 0 votes

Thanks this helped loads! :)

And for the first question it was written as a fraction so the 2^6 is over 3, so would i still have the same answer as yyou got?

Answered Sun 17th February, 2013 @ 16:12 by :) PurpleJaguar (: - Team GR
  • 0 votes

ur welcome..

yh even it is a fraction.. you still would get the same answer :)

Answered Sun 17th February, 2013 @ 19:09 by ? Secret - Team GR
  • 0 votes

Okay, thanks a lot :)

Answered Mon 18th February, 2013 @ 17:17 by :) PurpleJaguar (: - Team GR
  • 0 votes

I just realised that; i had a question in a past paper that asked me to show why 4^3/2 = 8

so i did 4^3 and got 64 then because the answer was 8 I knew to square root 64 not divide it by 2

So about the first question i asked, you would have to cube root 64 not divide by 3?Wouldn't you?

Answered Tue 19th February, 2013 @ 17:43 by :) PurpleJaguar (: - Team GR