Math Quiz
to find the first term arithmetic
USE ALL PARTS OF FIRST TERM GIVEN in arith nth formula set first term given equal to the first term plus d(n-1) n=the subscript of the first term given
Sum of a Finite Arithmetic Series
n is number of terms and an is last term
then once you have the first term you can find a specific later term by
nth term arithmetic forumla
explicit formula
puts ns back in to get basic and simplify
geometric to find r
set first term given equal to the second term times r to the power of the subtracted subscripts
in arithmetic to find d
set first term given plus n times d equal to the lat term given
then to find the first term
set the second term equal to a sub 1 times r to the n-1 n being the subscript of the second term then use normal geo formula
recursive
start with what the first term equals then a sub 1 plus 1 equals a sub n plus whatever was in front of n in the explicit