## anonymous one year ago NEED HELP ON ALGEBRA! will fan and medal :)

1. anonymous

So here's the question

2. anonymous

@Hero :) @nincompoop :) @whpalmer4 :)

3. anonymous

@.Sam.

4. sleepyjess

I'm not quite sure how you're supposed to put in the answer, since before the answer box they have A =, but we can still work it out together :)

5. anonymous

@.Sam.

6. sleepyjess

Okay, I'm back! :)

7. anonymous

Alright!

8. sleepyjess

Okay, so do you know Newton's 3rd law? For every action, there is an opposite and equal reaction?

9. anonymous

Yep :)

10. sleepyjess

Awesome! That's kind of what we have to do here, except using math. So if we add on one side, what will we do to get that addition to the other side of the equation?

11. anonymous

Rationalize? I dont know :(

12. sleepyjess

"$$\bf opposite$$ and equal reaction"

13. anonymous

Whaaaaat?

14. anonymous

15. sleepyjess

What is the opposite of addition?

16. anonymous

Subtraction?

17. sleepyjess

Yes!

18. sleepyjess

Now, for this equation, we want to isolate $$p*i$$, so to do that, we need to do what to the part that is being $$\bf divided$$

19. anonymous

bf?

20. anonymous

Not common to these terms.. sorry

21. sleepyjess

Opposite of division?

22. sleepyjess

I feel like I'm not making much sense :/

23. sleepyjess

@whpalmer4 ?

24. anonymous

You are making sense, just narrow down and use simple words so I can understand

25. anonymous

English's not my mother tongue, so please forgive me

26. anonymous

@sleepyjess you there

27. anonymous

@nincompoop

28. zpupster

$1-\frac{ 1 }{ (1+i)^n}$ lets look at just the denominator first now lets get a common denominator the first term 1 is just $\frac{ (1+i)^n }{ (1+i)^n }$ so together $\frac{ (1+i)^n }{ (1+i)^n }-\frac{ 1 }{ (1+i)^n}$ or $\frac{ (1+i)^n -1 }{ (1+i)^n }$ now when you multiply p*i by $(1+i)^n$ in the denominator it cancels and we are left with $A= \frac{ (p*i)(1+i)^n }{ (1+i)^n -1}$

29. sepeario

lol i thought it meant pi as in the number pi :)

30. anonymous

Haha nah.

31. anonymous

@ganeshie8 @nincompoop Hey guys help me to close this question :)

32. triciaal

@sleepyjess the A in the front is just the label it is what you are finding

33. triciaal

@MapuwanEstudent where are you stuck? @zpupster did the problem above. (I did not verify)

34. anonymous

Im not sure its the correct answer...