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#256 Re: Jai Ganesh's Puzzles » Interesting Information..... » 2017-04-11 16:41:23

Hi;

My memory is not as bad as my sister thinks or was it my brother...I forget.

You told me those answers.

#260 Re: Help Me ! » Trouble with circles » 2017-04-11 00:31:44

Hi;

Did you check the answer?

#264 Re: Help Me ! » Sum of cost over N yrs of item costing X this year with N% inflation » 2017-04-10 20:52:31

Hi;

Not true, I have learned a lot from your stuff.

The Y is already set up for numbers like .08

#271 Re: Help Me ! » Sum of cost over N yrs of item costing X this year with N% inflation » 2017-04-10 15:19:06

Hi bob bundy;

I did not mean I thought your solution was incorrect, I figured it was a rearrangement of mine..

It was the last part of the OP's question that might need to be done. Usually, when I see something parameterized it is in terms of one variable. Sort of like

Y = f(N)

X =g(N)

#272 Re: Help Me ! » Trouble with circles » 2017-04-10 15:09:08

Hi;

Use the distance formula on the points (-1,6) and (2,3) you will get

this will be r.

Then take the equation of a circle:

where h and k are the center of the circle.

I am sure you can finish from here.

#273 Re: Help Me ! » Sum of cost over N yrs of item costing X this year with N% inflation » 2017-04-10 03:28:07

Hi;

Since you just asked for a formula...

this is easy to derive from the recurrence relation and the summation of it, although I would not want to do it by hand. I see that bob bundy already explained one method to you...

The last part of your question... parameterized with respect to what?

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