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3 years ago

12

Using the digits 1 to 9 (each exactly once), form three 3- digit numbers so that the second number is 2 times the first and the

third number is 3 times the first.?

2 answers:

____ [38]3 years ago

7 0

219, 438, 657
192, 384, 576
273, 546, 819

lina2011 [118]3 years ago

4 0

Answer:

123, 246, 369

Step-by-step explanation:

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The total number of possible fivey sequences are; 6

<h3>How to solve a sequence?</h3>

We are told we are dealing with a fivey sequence which means that all the terms of the sequence must be positive integers and they must add up to 5.

Now, the possible numbers that can be used are;

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2 years ago

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TEA [102]

Answer:

$x = \dfrac{-\log 7}{\log 7 - \log 2}$

Step-by-step explanation:

$2^x = 7^{x + 1}$

Take the log of both sides.

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Use properties of log.

$x \log 2 = (x + 1) \log 7$

$x \log 2 = x \log 7 + \log 7$

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