Помогите.
Геометрическая прогрессия
-----------------#1------------------
bn = 5 * 2 в n степени.
b2 = ?
q = ?
b4 = ?
-----------------#2------------------
b1=1/4
q=2
b8=?
------------------#3-----------------
b2=2
q=1/2
b1=?
b3=?
b4=?
------------------------------------
Геометрическая прогрессия
-----------------#1------------------
bn = 5 * 2 в n степени.
b2 = ?
q = ?
b4 = ?
-----------------#2------------------
b1=1/4
q=2
b8=?
------------------#3-----------------
b2=2
q=1/2
b1=?
b3=?
b4=?
------------------------------------
Answers & Comments
б2=5*2^2=20
q=20/10=2
б4=5*2^4=80
2. б8=1/4*2^7=128/4=32
3. 1/2б1=2
б1=4
б3=4*(1/2)^2=4*1/4=1
б4=4*(1/2)^3=4*1/8=1/2