x y x y x y . . = 2 , y x y x y x . . = 2 3
Let x and y be real numbers such that they satisfy both the equations above. If x y can be expressed in the form n b a where g c d ( a , b ) = 1 and n is the minimum positive integer satisfying the expression, determine
L C M ( a , b , n ) − ( a + b + n )
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Great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great great. Question: how many vowels in my reply? Anyway, yours is a very nice solution.
The question refers that gcd of a and be is 1 which is meaningless coz it cannot be expressed in rational form
Very nice solution..
But you have posted your final answer as 7
Same solution here bro :D (y)
x 2 3 = 2 and y 2 = 2 3 upon simplifying x × y we will have 6 5 4 = x y
Now a = 5 4 , b = 1 , c = 6 L . C . M ( 5 4 , 1 , 6 ) = 5 4
Now simply calculate 5 4 − ( 5 4 + 6 + 1 ) which is − 7
Same solution lang kami ni Kesa
Haha, huwag ka magtagalog bro, hindi naman yata Pinoy karamihan dito eh :D
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Should i speak bisaya? hahaha xD
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Hahahaha! Eh pareho lang namang hindi maiintindihan yun ng iba eh XD
Anyway, it feels good to see a fellow Pinoy in this site :)
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Since x y x … = 2 and y x y … = 2 3 , we have
x 2 3 = 2
y 2 = 2 3
by substitution. Simplifying and converting, we have
x = 2 3 2 = 2 6 4 = 6 1 6
y = ( 2 3 ) 2 1 = ( 2 3 ) 6 3 = 6 8 2 7
Therefore,
x y = 6 1 6 × 6 8 2 7 = 6 5 4
Hence, a = 5 4 , b = 1 , c = 6 .
L C M ( 5 4 , 1 , 6 ) = 5 4
5 4 − ( 5 4 + 6 + 1 ) = − 7
Therefore, the answer is − 7 .
The reason I converted the fractions in the exponents into like fractions is so that it would be easy to multiply out the expression in the end.