What is the value of upto s= 20 terms, then what is the value of S

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QID:6. What is the value of upto \[ S=\frac { 1 }{ 1x3x5 } +\frac { 1 }{ 1×4 } +\frac { 1 }{ 3x5x7 } +\frac { 1 }{ 4×7 } +\frac { 1 }{ 5x7x9 } +\frac { 1 }{ 7×10 }\]… 20 terms, then what is the value of S ?

 

A) 6179/15275

B) 6070/14973

C) 7191/15174

D) 5183/16423

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