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Need help with Trig Homework


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#1 Isabella89

Isabella89

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Posted 13 November 2007 - 03:28 PM

I don't think I am getting this. could someone who is good at trig check my answers, and if they are wrong give me the right answer and how you get it.


5) find the sum if A1=256, r = 3/4, and n=9

I put it in the calculator : (256-256x3/4^9)/(1-3/4)

My answer is 242461/256

6) find the sum if A1=625, R = 2/5, n=8

I put it in the calculator: (625-625x2/5^8)/(1-2/5)

My answer is 130123/125

7) Find the sum if A2 = -12, A5 = -324, n = 10

I did two or three steps and got -480.


Something really doesn't seem right. If someone could check this and show me what I am doing wrong I would be very greatful.

#2 upstream

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Posted 14 November 2007 - 04:18 AM

the answer is yes!

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xD

A hands on personal help will help you more.

#3 a_rdi88

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Posted 14 November 2007 - 04:25 AM

rrrrrr.. i guess i already wrong click thread.
ew, math.. definetely, math is not created for me.
good luck for u Isabella89. God bless u.. amen.




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