Arithmetic and Geometric Sequences Play This Game Live Now Join Live Game as a Player
5, 12, 19, 26, 33, 40
5, 12, 19, 26, 33, 40
d=7
24, 13, 2, -9, -20, -31
24, 13, 2, -9, -20, -31
d=-11
5, 15, 45, 135, 405, 1215
5, 15, 45, 135, 405, 1215
r=3
3, -12, 48, -192, 768, -3072
3, -12, 48, -192, 768, -3072
r=-4
1701, 567, 189, 63, 21, 7
1701, 567, 189, 63, 21, 7
r=1/3
a(1)=7 a(n)=a(n-1)+6
a(1)=7 a(n)=a(n-1)+6
7, 13, 19, 25, 31
a(1)=30 a(n)=a(n-1)-9
a(1)=30 a(n)=a(n-1)-9
30, 21, 12, 3, -6
a(1)=-4 a(n)=4a(n-1)
a(1)=-4 a(n)=4a(n-1)
-4, -16, -64, -256, -1024
a(1)=1 a(n)=-8a(n-1)
a(1)=1 a(n)=-8a(n-1)
1, -8, 64, -512, 4096
a(1)=96 a(n)=0.5a(n-1)
a(1)=96 a(n)=0.5a(n-1)
96, 48, 24, 12, 6
-4, -2, 0, 2, 4
-4, -2, 0, 2, 4
a(1)=-4 a(n)=a(n-1)+2
10, 7, 4, 1, -2
10, 7, 4, 1, -2
a(1)=10 a(n)=a(n-1)-3
3, 6, 12, 24, 48
3, 6, 12, 24, 48
a(1)=3 a(n)=2a(n-1)
-2, 10, -50, 250, -1250
-2, 10, -50, 250, -1250
a(1)=-2 a(n)=-5a(n-1)
80, 40, 20, 10, 5
80, 40, 20, 10, 5
a(1)=80 a(n)=1/2a(n-1)
-7, -4, -1, 2, 5
-7, -4, -1, 2, 5
a(n)=-7+(n-1)(-3)
5, 1, -3, -7, -11
5, 1, -3, -7, -11
a(n)=5+(n-1)(-4)
19, 28, 37, 46, 55
19, 28, 37, 46, 55
a(n)=19+(n-1)(9)
-6, -1, 4, 9, 14
-6, -1, 4, 9, 14
a(n)=-6+(n-1)(5)
8, 2, -4, -10, -16
8, 2, -4, -10, -16
a(n)=8+(n-1)(-6)
-7, -4, -1, 2, 5
-7, -4, -1, 2, 5
80
5, 1, -3, -7, -11
5, 1, -3, -7, -11
-121
19, 28, 37, 46, 55
19, 28, 37, 46, 55
280
-6, -1, 4, 9, 14
-6, -1, 4, 9, 14
139
8, 2, -4, -10, -16
8, 2, -4, -10, -16
-166
5, 5/4, 5/16, 5/64 Write the explicit formula
5, 5/4, 5/16, 5/64 Write the explicit formula
a(n)=5*(1/4)^(n-1)
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Go To The Final Question
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