nth term of ap
a+(n-1)d
Sn of AP
1/2n(a+l) OR 1/2n(2a+(n-1)d)
SEQUENCE FOR AP
a, a+d, a+2d, a+3d
nth term for GP
ar^n-1
total
sum
greatest, theoretically achieved
sum of infinity
Sn for GP
a(1-r^n)/1-r
Sum of infinity for GP
a/1-r
sequence for GP
a,ar,ar^2,ar^3