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Arithmentic - An=
An=A1+(n-1)d
Arithmetic Sn=
Sn=n/2(A1+An)
Geometric An=
An=A1xr^n-1
Geometric Sn=
Sn=A1(1-r^n)/(1-r)
Geomentric Soo
Soo=A1/(1-r)