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Mathematics 12 Online
OpenStudy (anonymous):

Need help. Will medal and fan

OpenStudy (anonymous):

\[\frac{ 1 }{ 2 }+\frac{ 1 }{ 3 }+...+\frac{ 1 }{ x }>1 \frac{ 1 }{ 2 }\]

OpenStudy (anonymous):

What is the smallest posible value of x

OpenStudy (anonymous):

X=1

OpenStudy (solomonzelman):

\[\large \sum_{n=2}^{x}\frac{ 1 }{ n }>1+\frac{ 1 }{ 2 }\] this is the problem (i am kinda slow right now esp. with foreign keyboard)

OpenStudy (solomonzelman):

\(\displaystyle\large \sum_{n=2}^{x}\frac{ 1 }{ n }>1+\frac{ 1 }{ 2 }\) \(\displaystyle\large \sum_{n=3}^{x}\frac{ 1 }{ n }>1\)

OpenStudy (solomonzelman):

i am thinking about it sorry...:)

OpenStudy (solomonzelman):

do partial sums suffice or want some legit math? because so far i only see partial sums

OpenStudy (anonymous):

Do whatever you can

OpenStudy (solomonzelman):

1/3+1/4=7/12 7/12 + 1/5 = (35+12)/60 = 47/60 47/60 + 1/6 = (47 + 10)/60 = 57/60 57/60 + 1/7 = (399 + 60)/420 = 459/420

OpenStudy (solomonzelman):

\(\displaystyle\large \sum_{n=3}^{x}\frac{ 1 }{ n }>1\) \(\displaystyle\large x=7\) based on partial sums

OpenStudy (anonymous):

yay!

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