Directions Multiply both sides of the equation by r.

Find Sn-rSn

Factor out Sn and a

Solve for Sn

Please show all the work and I will give brainiest

6/20

step-by-step explanation:

mia khalifa

step-by-step explanation:

answer:  

step-by-step explanation:

odd numbers are only divisible by 1 and itself.

even numbers are divisible by more than 1 and itself.

for example 6 is even because it is divisible by more than 1 and its self. 1 x 6= 6 ; 2 x 3= 6

and 7 is odd because only 7 x 1 equals seveb