Indices trouble (1 Viewer)

[darshil]

i tried but could not do some questions:

Express as positive indices
1.
2. 4^-2 * 6^3 * 8^4 x 12^-2


Thanks for all the help seriously

 

[solomarc20]

(3^2n x 25^2n-1) / (15^n-1)

= (3^2n x 5^(4n-2) / ((3x5)^n-1)
= (3^2n x 5^(4n-2) / ((3^n-1) x (5^n-1))
= (3^n+1) x (5^3n-1)

If the working above is not right, you need to apply your index laws to simplify the numbers down to 3s and 5s, before cancelling. I hope I'm right...

 

[TBK11]

2)
4^-2 * 6^3 * 8^4 x 12^-2
Note: where the . is thats (Times) [=

 

[lolokay]

^except that the ^-2's have been turned into -2's

 

[darshil]

thanks for the reply guys, im gonna ace it now