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Mathematics: Post your doubts here!

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Yea.. it seems so .. but if it were GP. The sum to infinity is 8 and not 14 and nth term would be 2(1-(3/4)^n)/(1-3/4).
2-2(0.75)^n/0.25

8-8(0.75)^n would be the answer.
looks like its not mechanics :p
no wonder i couldn't get it :p
 
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if i had my scanner working .... i would scan it .... i got a book ... and i am SURE it will come this year ... and saay i didnt tell u !!
well i cant understand but just tell me which paper it belongs to as it looks like pure stats and mechanics :/
 
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so no one knew how to solve the question !!!
as i said it was challenging

The answer equation you have given is incorrect or you are missing something out of the question..

if T1 = 2 , then T2 = 2*0.75 or not? Just answer me this. If it is Then what I have done is correct.

Verify this for me.
a = 2
r = 3/4
n = n ?

a)
Sn = a(1-r^n)/1-r
Sn = 2(1-0.75^n)/1-0.75
Sn = 2-2(0.75^n)/0.25
Sn = 8-8(0.75^n)

b)
Sinf = a/1-r
Sinf = 2/1-0.75
Sinf = 8
Can't be greater than 8.
 
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