Consider the following series:

7+9+11+13++105\displaystyle {7}+{9}+{11}+{13}+\ldots+{105} 

Question 1

Calculate the number of terms in this series

Formula

   (ignore subscripts in this step but not in written work)

Stocktake

Type in the list of known variables, example x=1,y=2...:

 

Substitute

   (use subscripts if necessary in this step)

Solve

   (use subscripts if necessary in this step)

(3)


 Question 2

Find the sum of the above series

Formula

   (ignore subscripts in this step but not in written work)

Stocktake

Type in the list of known variables, example x=1,y=2...:

 

Substitute

   (use subscripts if necessary in this step)

Solve

   (use subscripts if necessary in this step)

(3)


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