Question

If M=1/2 + 1/6 + 1/12 + 1/20 + 1/30 +..... 1/156, then find the value of "M".
i) 12/13 ii)13/12 iii) 1/13 iv) none of these

Answer 1

6/12 + 2/12 + 1/12 + 1/20 ... that 20 seems out of place

Answer 2

it doesnt seem geometric or addiced

Answer 3

But that's what is the question given. I am in doubt whether we can solve in any form of A.P. or G.P. or by taking 1/2 outside and doing further calculations.

Answer 4

do doference of differences and see if there is a common down the line

Answer 5

NO, I don't think so.

Answer 6

t(r) = 1/(r)(r+1)

Answer 7

1/2+ (1/3-1/2)+(1/4-1/3)+(1/5-1/4)+.....(1/13-1/12)

Answer 8

t(r) = 1/ r - 1/(r+1)

Answer 9

so 1/13

Answer 10

Thanks, Uzma. I wanted this answer. I have another question.

Answer 11

did u understand?

Answer 12

Yes, now I am clear with the concept.

Answer 13

ok now ask ur second one

Answer 14

for $100 youd think theyd make a calculator that could show simplified fractions for an answer ...

Answer 15

whats the question?

Answer 16

I have posted it in the main page.