Welke rij is een meetkundige rij ? | A. 1, 11, 111, 1111, ... |
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B. 1, 12, 123, 1234, ... | |
C. 1.2, 2.3, 3.4, 4.5, ... (4.5=20) | |
D. 1, − 1, 1, − 1, ... | |
E. 10, 20, 30, 40, ... |
[ 4-4027 - op net sinds 21.9.03-(E)-24.10.2023 ]
Which sequence is a geometric sequence ? |
A.   1, 11, 111, 1111, ... |
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B.   1, 12, 123, 1234, ... | |
C.   1×2, 2×3, 3×4, 4×5, ... | |
D.   1, − 1, 1, − 1, ... | |
E.   10, 20, 30, 40, ... |