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  • Find the sum of all odd numbers between 0 and 50.           <div styl

Find the sum of all odd numbers between 0 and 50.

 

 

 

 
 
 
 
 

Answers (1)

Odd number between 0 and 50 are 

1, 3, 5, 7, 9, ..., 49.

l=a+(n-1)d

49=1+(n-1)2

49=1+2n-2

2n=50

n=25

S_n=\frac{n}{2}[a+l]

       =\frac{25}{2}[1+49]

       =25\times 25

       =625

 

Posted by

Ravindra Pindel

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