abhas Active member
| Subject: Find sum of series [solved] Wed Aug 27, 2008 6:32 pm | |
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By Euler's formula .
Consider, .
Then, the sum in 1) of the problem is , and that in 2) is .
Here and represents, respectively, the real and the imaginary part of the complex number .
Now,
where I have used the fact that, for ,
.
Now, we see that
So we get, and .
Accordingly,
1)
2) |
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sadanand Guest
| Subject: model paper of I.sc 2009 from U.p board Wed Jan 14, 2009 10:51 pm | |
| Dear sir/madam i need model paper of subject Hindi/phy/chem/bio and eng with answer if its possible please help me & send me an my email my email address is given below
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samuel007
| Subject: Re: Find sum of series [solved] Thu Feb 19, 2009 12:10 pm | |
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| Subject: Re: Find sum of series [solved] | |
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