3,6,9,12
can u explain plzz
Hello, NeedHelp18!
Find the sum of the first 20 terms of this geometric sequence:
. . 3, 6, 9, 12, . . .
can u explain plzz
This will take a lot of explaining because . . .
(1) You seem to know nothing about sequences . . .
. . .especially the sum-formulas.
(2) It is not a geometric sequence.