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VashaNatasha [74]
3 years ago
7

For any integer k > 1, the term "length of an integer" refers to the number of positive prime factors, not necessarily distin

ct, whose product is equal to k. For example, if k = 24, the length of k is equal to 4, since 24 = 2 × 2 × 2 × 3. If x and y are positive integers such that x > 1, y > 1, and x + 3y < 1,000, what is the maximum possible sum of the length of x and the length of y?
Mathematics
1 answer:
creativ13 [48]3 years ago
7 0

Answer:

16

Step-by-step explanation:

We must find integers x, y with the most amount of prime divisors, not necessarily distinct, such that x + 3y < 1,000.

Obviously, this is achieved when the divisor is the least prime 2. So, we must find integers n, m such that

\large 2^n + 3*2^m < 1,000  

since \large 2^10 = 1,024 , then <em>n must be 9</em>. For n=9 we find the greatest integer m such that  

\large 2^9 + 3*2^m  

and<em> we find m=7 </em>

 and  \large x=2^9 , \large y=2^7  are the numbers we are looking for and the sum of their length is 9+7 = 16.

So, 16 is the maximum possible sum of the length of x and the length of y.

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aalyn [17]
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4/9= 0.444 ==> never ending, repeating
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All of the above are terminating decimals except for 4/9!!

Memes (for stupidity) :
Everyone is entitled to be stupid,
But you abuse the privilege

You find it offensive,
I find it funny...

That's why I'm happier than you!
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