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