Question
Find the 20th term for 5,-5,-15,-25
Answers
bobpursley
Arithemetic, distance is -10, first term 5, n=20
a<sub>n</sub> = a<sub>1</sub> + ( n − 1 ) d
a<sub>n</sub> = a<sub>1</sub> + ( n − 1 ) d