3186479
Beschreibung
Karteikarten von Rionn Pineda, aktualisiert more than 1 year ago
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Erstellt von Rionn Pineda
vor mehr als 8 Jahre
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| Frage | Antworten |
| Find the sum of the first 20 terms of the arithmetic sequence 4, 6, 8, 10, ... | 460 |
| Find the sum of the arithmetic sequence -8, -5, -2, ..., 7 | -3 |
| Insert three geometric means between 1 and 81. | 1, 3, 9, 27, 81 |
| A display of cans on a grocery shelf consists of 20 cans on the bottom, 18 cans in the next row, and so on in an arithmetic sequence, until the top row has 4 cans. How many cans, in total, are in the display? | There are 108 cans. |
| How many terms of the arithmetic sequence -3, 2, 7, ... must be added together for the sum of the series to be 116? | 8 |
| Find which term 4/15 is in the harmonic sequence 1, 4/5, 2/3, 4/7... | 12 |
| Find the harmonic mean of 5, 10 & 15 | 90/11 |
| Write the first 8 terms of the Fibonacci sequence whose 1st term is 9, and 2nd term is 10. | 9,10,19,29,48,77,125,202 |
| Find the harmonic mean of 10 and 5. | 20/3 |
| Find the formula for the geometric sequence 2,1,1/2,1/4 | An = 2(1/2)^n-1 |
| Insert 2 geometric means between 6 and 162 | 6,18,54,162 |
| Find the arithmetic mean of 6 and 18 | 12 |
| Find the arithmetic mean of 7 & 27 | 17 |
| Insert two arithmetic means between 16 & 31 | 16,21,26,31 |
| Write the formula for an Arithmetic series. | Sn = n/2(A1 + An) |
| Write the formula for an arithmetic sequence. | An = A1 + (n-1)d |
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