# math

posted by .

please - How do we manually calculate the Present Value of annuity step by step using this formula:
PV=R[1-(1+i)-n / i

for example:

PV = 2700[1-(1+.065)-4
___________________ = 9249.66
0.065

How did they get this answer (9249.66)?
I'm so lost. just to clarify too, -4 is an exponent. I couldn't change font for this to be apparent. Please a step by step answer would really help. Thank you in advance for your help, this site is such a wonderful service.

• math -

hoping you have a decent calculator with brackets, here are the keystrokes I did on my "Sharp"

1
-
(
1.065
yx , (you should have such a key)
4 ±
)
=
÷
.065
=
x
2700
=

I get 9249.66

• math -

If I could hug you I would. You have no idea how helpful this was, I can now proceed with the rest of the equations. Thank you kindly :)

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