Recent content by TonyC

Trying to find the binomial coeffiecients of 9....9 and 6....9 How do I do this? :yuck:

Ah ha! I have come up with 9 for S3. I am still baffled with the second. I am not grasping something.

Can anyone lend some advice?

For the S3= -3 ((-2)3+ 5) = -3 (Am I not doing this correctly?) #2:For r, I have r=1/3

Thank you very much.

Thanks for the help, I have come up with S1=3 and S3=-3 For the second I have come up with an answer of .518 Am I correct?

I am having trouble with the following problem: What will be the value of an annuity in today's dollars if $1000 is to be deposited for 18 years into an account paying 4.5% interest compounded annually? I used the following formula (I'm guessing I've figured something incorrectly) A=...

I am working with problems which are taking a toll on me. 1st and 3rd partial sums of the sequence An=(-2)^n+5 ----I don't even know what formula to use to start this problem and sum of hte geometric series: 2/3 - 4/9 + 8/27 - ... I think I use this formula for this one: S=A1/1-r...

I posted the work I have been doing with Matrices previously, thanks for your concern

Still trying to figure this out

Not exactly sure what I am saying. I am not having trouble with any other methods, i.e. Cramer Method, Gaussian, elementary row operations. This one has me truly stumped. Maybe I'm too tied (or old) to grasp it today.

How would I go about solving a systme of equations using an inverse matrix? i.e. -10x - 6y = 6 7x + y = -7

Thank you very much!

or is it written: [57,-78] ?

Just so I have this straight: (0)(7) + (9)(5) + (-6)(-2) = 57 (-2)(7) + (-10)(5) + (7)(-2) = -78 written: 57 -78 am I correct?