Math, asked by shivamsingh5, 1 year ago

find the sum of follwing APs 2,7,12,....10terms

Answers

Answered by pankaj12je
5
Hey there!!

2,7,12...................

common difference of given AP (d)=5 ,a =2 , n=10

Sum of n terms is an AP= n(2a+(n-1)d)/2
                                       
                                     =10(2*2+(10-1)*5)/2
                                       =10(4+45)/2
                                      =5*49
                                     = 245 
                                       
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