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Mathematics 20 Online
OpenStudy (anonymous):

efreferwtfr

OpenStudy (anonymous):

@Mertsj @phi

OpenStudy (anonymous):

a=2? b=(ln(3)-ln(2))/(2ln(2))?

OpenStudy (anonymous):

no b is wrong. how would you solve for b

OpenStudy (anonymous):

b(0)=0

OpenStudy (phi):

b=(ln(3)-ln(2))/(2ln(2))? close... where did the extra 2 come from in the bottom

OpenStudy (anonymous):

haha not sure since it's wrong. which two is the extra?

OpenStudy (phi):

at the point 1,3 (and with a=2) 2 * 2^(b*1) = 3

OpenStudy (anonymous):

oh is it just ln(2) as the denominator?

OpenStudy (phi):

you could do a few things 2^1 * 2^b is 2^(b+1) so you have 2^(b+1) = 3 solve by taking the log of both sides or 2* 2^b= 3 divide both sides by 2 2^b= 3/2 solve by taking the log of both sides

OpenStudy (anonymous):

yup i got it

OpenStudy (phi):

can you go through the steps?

OpenStudy (anonymous):

yeah you get 2^b=3/2 and then you take the natural log of both sides which makes it b=ln(3/2)/ln(2)

OpenStudy (phi):

yes, ln(2^b) is b*ln(2) ln(3/2) can also be written ln(3) - ln(2) b= ln(3)/ln(2) - ln(2)/ln(2) = ln(3)/ln(2) - 1 if we did it the other way 2^(b+1) = 3 (b+1) * ln(2) = ln(3) (after taking the log of both sides divide by ln(2): b+1 = ln(3)/ln(2) sub 1 b= ln(3)/ln(2) -1

OpenStudy (mertsj):

@habibmatatta Now, as I was saying... 2=a(2)^b(0) 2=a(2)^0 2=a(1) a=2 Also from the second ordered pair 3=a(2)^(b(1) 3=2(2)^b 1.5=2^b log 1.5=b(log 2) .58=b y=2(2)^.(58x)

OpenStudy (anonymous):

ok thanks

OpenStudy (mertsj):

yw

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