????????? spaeses ?????????
??????? yu tri tu sae yu hav a SEQUENS av integers,
such as 1, 2, 3, 4... ????????
sum av 4=46
sum av 5=70, thus term 5=70-46.......LAST TERM=24
sum=averaej*(num numbers)...... AVERAEJ=70/5=14
averaej=(term 1 + last term)/2...
so term 1=(2* averaej) -(last term)=2*14 -24 =28-24
TERM1 =4
last term=first term +(step size)*(num terms -1)
step size=(last term - term1) /4 =20/4....5
sequens....4, 9, 14, 19, 24, 29, 34, ...