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#10756 Re: Help Me ! » Need help with those logarithms. » 2011-05-28 05:55:01

hi gAr,
do you maybe know how the number e was found?

#10757 Re: Help Me ! » Need help with those logarithms. » 2011-05-28 05:30:02

hi gAr,
thanks for the explanation
i think that if the base is e then it would be:

#10758 Re: Help Me ! » Need help with those logarithms. » 2011-05-28 02:53:00

hi gAr and soroban,
you helped me a lot.
but i have to ask you what the logarithm of a negative number is if the baseof the algorithm is not e=2,7.

#10762 Re: Help Me ! » Need help with those logarithms. » 2011-05-26 04:36:25

thought so but it's different in the solution. maybe the solution is wrong.thanks anyway.

what about this:

#10764 Help Me ! » Need help with those logarithms. » 2011-05-26 03:57:19

anonimnystefy
Replies: 14

Need help about this problem. I almost got it but I must have messed it up somewhere.
We have a system of two eqations:

#10766 Re: Jai Ganesh's Puzzles » 10 second questions » 2011-05-26 03:48:03

they have to be equal and they have to be cubes

#10767 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 03:27:34

hi zee-f,

14. find y for x=7 in the function you got.

15,16,17,18 corespond to 11,12,13,14.

#10768 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 03:18:40

hi gAr

missed that.thought it was mixed.

#10769 Re: Help Me ! » An interesting problem » 2011-05-26 03:16:56

hi gAr,
Ihave one for you:
we have two trains on the distance of 300 meters.On one fly there is a fly traveling from one train to another with velocity of 30m per second.The trains are going towards each other one with velocity of 10m per second,and the other with velocity of 20 m per second.What's the overall distance that the fly will overcome until the trains crash into each other?

#10773 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 02:53:40

zee-f wrote:

4.       -5/7=slope or M
           y-k=m(x-h)
           y+2=-5/7(x+8)
           y=-5/7x+6

when you have a number in front of parentheses you have to multiply everything inside them. so:

#10774 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 02:46:38

zee-f wrote:

3.6-5\9-8=1\1=1  slope=1 
       
        y-k=m(x-h)
        y-5=1(x-8)
        y-5=1x-8
        y=1x+3

again just need 1x-3 instead of 1x+3.

#10775 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 02:42:25

zee-f wrote:

2.     y-k=m(x-h)

        y-3=2(x--1)
       
         y-3=2(x+1)
         y-3=2x+2

         y=2x+-1

you just messed up the last part.

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