1st Example: first term 5, and ratio r = 2
5 , 10 , 20 , 40 , 80, ...
2nd Example: first term 5, and ratio r = - 2
5 , - 10 , +20 , -40, +80, ....
Answer: 40
Step-by-step explanation: 10 • 10 equals 100, so each side is 10. Since a square has 4 sides multiply 4 by 10 which gets you 40.
I honestly dont know, the only idea I have is to divide 1800 by 4 to see how much.
A1 = -7, an = 4(an - 1)
a2 = 4a1 = 4(-7) = -28
a3 = 4a2 = 4(-28) = -112
Therefore, the first six terms are -28, -112, -448, -1792, -7168, -28,672
