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27 Jun 2021, 21:00
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b: 2
c: -2
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
51% (02:36) correct
49%
(02:51)
wrong
based on 337
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The value of a term in a certain sequence is determined by raising a constant to an exponent that is 1 less than the number of that term's position in the sequence and multiplying the result by the first term. The constant does not equal any of the terms, the third term is 8, and the fifth term is 32.
Select the value of the first term b and select the value of the constant c. Make only two selections, one in each column.
Select the value of the first term b and select the value of the constant c. Make only two selections, one in each column.
| b | c | |
| -16 | ||
| -4 | ||
| -2 | ||
| 2 | ||
| 4 | ||
| 12 |
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Official Answer
b: 2
c: -2
28 Jun 2021, 03:10
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Sajjad1994
The first term is \(b*c^(1-1)=b\)
The third term will be \(b*c^2=8\)……(1)
The fifth term will be \(b*c^4=32\)…..(2)
Substitute value of c^2 from (1) in (2)
\(b*(\frac{8}{b})^2=32……32b=64…..b=2\)
Now \(b*c^2=8…….c^2=4\), so c can be 2 or -2.
But as c cannot equal any term, and first term is b=2, c=-2
b=2 and c=-2
07 Aug 2025, 04:23
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