basic tips for extension indices work (1 Viewer)

[physicschick]

Hey I'm doing extension 1 maths in year 11 and its hard! we are doing indices and i get all the basic rules but I'm finding the more advanced stuff annoying cos our teacher isnt really giving me a formula to apply to this stuff and i need to know exact things to look for and apply you know?

so if u no how to do this stuff just any tips for how to simplify these or just what u look for, would be soooo appreciated

sorry I'm new at this blogging stuff so i just made the powers bold and the dot is a multiplication

8n+2 - 6(23n+3)
2n . 4n+2

thanks!

 

[chumbumm. =D]

i dont get this indices thing either!

 

[Timothy.Siu]

8ⁿ⁺² - 6(2³ⁿ⁺³)
2ⁿ . 4ⁿ⁺²


well for indices a^(m+n)=a^m . a^n
so,

=(2^3)ⁿ⁺²-6(2³ⁿ⁺².2)
..2ⁿ.(2^2)ⁿ⁺²

=(2^3)ⁿ⁺²-6(2³ⁿ⁺².2)
...2³ⁿ⁺²

=2³ⁿ⁺²(2^4-6x2)
...2³ⁿ⁺²

=2^4-6x2=4