Find sum of following series5+(-41)+9+(-39)+13+(-37)+17+........+(-5)+81+(-3)

Find sum of following series5+(-41)+9+(-39)+13+(-37)+17+........+(-5)+

1.	Find sum of following series5+(-41)+9+(-39)+13+(-37)+17+........+(-5)+81+(-3)
Answer» The series becomes -36,-30,-24 after adding the respective numbers so here a=-36 d=6 we don\'t know n and an= 78 so by substituting the values of of a ,d,and an in an formula u get n and by substituting n,an and ,a in an formula u get the answer...hope it helped Kisi ko aata hai ??