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The value of Sigma( r =2)^( infty) tan^...

The value of ` Sigma_( r =2)^( infty) tan^(-1) ( 1/( r^(2) - 5r + 7)) ` , is

A

`pi/4`

B

`pi/2`

C

`(3pi)/4`

D

`(5pi)/4`

Text Solution

Verified by Experts

The correct Answer is:
C
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