Question 8 C ii. (1 Viewer)

[Swalbs]

Everyone is talking about question C iii but i have no clue on how to get ii out.

Show that An = 10^6[4-(1.12)^n]

help ??

 

[Jago]

A_n = (3 x 10⁶)(1.12ⁿ) - (4.8 x 10⁵)[(1.12ⁿ - 1) / 0.12]

A_n = (3 x 10⁶)(1.12ⁿ) - (4 x 10⁶)[(1.12ⁿ - 1)

A_n = 10⁶ (3 x 1.12ⁿ - 4 x 1.12ⁿ + 4)

A_n = 10⁶ (4 - 1.12ⁿ)

 

[Swalbs]

Thanks man

 

[seremify007]

How do you guys get it to look so neat when typing on forums ><

There's some other stuff on q8 here: http://community.boredofstudies.org/showthread.php?t=89826

 

[Haku]

just confirming the last part the answer is 2017 right?...

there was some argument in the threads. not sure which won

 

[Jago]

How do you guys get it to look so neat when typing on forums ><

There's some other stuff on q8 here: http://community.boredofstudies.org/showthread.php?t=89826

quote me and find out.

and i put the answer as 2018, but i wasn't erally sure.