subebe
3a. U4 = ar^3 = 8 U6 = ar^ 5 = 729 U6/U4 = 729/8 ar^5/ar^3 = 729/8 r^2 = 729 / 8 r = 27 / 2√2 atau r = - 27/2√2 jika r = 27/2√2 U4 = ar^3 a (27/2√2)^3 = 8 a x 19683 / 16√2 = 8 a x 19683 = 128√2 a = 128√2 / 19683 jika r = -27/2√2 U4 = ar^3 a (-27/2√2)^3 = 8 a x -19683 / 16√2 = 8 a x -19683 = 128√2 a = -128√2 / 19683
4.c U2 = √2 U5 =8 U5/U2 = ar^4/ar r^3 = 8/√2 r^3 = 8√2/ 2 = 4√2 r^3 = √32 r^3 = (2)^ (5/2) r = 2^ (5/6) a= U2/r a = √2/ (2^(5/6) a = 2^(1/2 - 5/6) a = 2^(-2/6) a= 2^(-1/3) a = 1/∛2
U4 = ar^3 = 8
U6 = ar^ 5 = 729
U6/U4 = 729/8
ar^5/ar^3 = 729/8
r^2 = 729 / 8
r = 27 / 2√2 atau r = - 27/2√2
jika r = 27/2√2
U4 = ar^3
a (27/2√2)^3 = 8
a x 19683 / 16√2 = 8
a x 19683 = 128√2
a = 128√2 / 19683
jika r = -27/2√2
U4 = ar^3
a (-27/2√2)^3 = 8
a x -19683 / 16√2 = 8
a x -19683 = 128√2
a = -128√2 / 19683
4.c
U2 = √2
U5 =8
U5/U2 = ar^4/ar
r^3 = 8/√2
r^3 = 8√2/ 2 = 4√2
r^3 = √32
r^3 = (2)^ (5/2)
r = 2^ (5/6)
a= U2/r
a = √2/ (2^(5/6)
a = 2^(1/2 - 5/6)
a = 2^(-2/6)
a= 2^(-1/3)
a = 1/∛2