use the expression to find the value of the 20th term.
a. 24
b. 76
c. 80
d. 84
3 answers
Which expression?
algebraic
If you think on 4,8,12,16,...
then :
an = 4 n
a20 = 4 *20 = 80
then :
an = 4 n
a20 = 4 *20 = 80