preparation for my Monday math exam....

[jimmy1999]

Pamela wants to know how much money she would have if her bank tripled her money every day for 30 days. she starts with 2$.

1=2$
2=6$
3=18$
4=54$

Calculate the amount on day 14. show me your formula.

What will be the formula for that? I am studying my Monday exam and I still not understand that problem. Can you help me please!

 

[tkhunny]

You need to develop your own formula. You can't memorize a formula for every possible situation.

Day 1 - 2
Day 2 - 6

Hmmm... If the number of the day is 'n', maybe the money on Day n is \(\displaystyle 2\cdot 3^{n}\)

Check it out. If that's not right, come up with your own conjecture and improve it.

 

[rbcc]

Hi,

What you can do for these types of problems is to wright out whats happening

day 1 2=3^0(2)
day 2 3(2)=3^1(2)
day 3 3(3(2))=3^2(2)
day 4 3(3(3(2)))=3^3(2)

etc.

now use tkhunny's hint and you'll get it

Hope this helps!