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Sonbull [250]
2 years ago
8

Which of the numbers in each pair is farther to the left on number line?

Mathematics
1 answer:
yuradex [85]2 years ago
7 0
What are the numbers
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40.5

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How many solutions does the following equation have?<br><br> 3x^2+10x+2=0
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one solution

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A and B are postive integers such that 1/a + 1/b +1/ab = 1. Find ab
Kitty [74]

Answer: ab =6

have:

\frac{1}{a}+\frac{1}{b}+\frac{1}{ab}=1\\\\=>\frac{b}{ab}+\frac{a}{ab}+\frac{1}{ab}=1\\\\\frac{a+b+1}{ab}=1

=> a + b + 1 = ab

⇔ a + b + 1 - ab = 0

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⇔ (b - 1)(1 - a) = -2

because a and b are postive integers => (b - 1) and (1 - a) also are integers

=> (b - 1) ∈ {-1; 1; 2; -2;}

(1 -a) ∈  {-1; 1; 2; -2;}

because (b -1).(1-a) = -2 => we have the table:

b - 1        -1             1              2             -2

1 - a         2            -2            -1              1

a              -1            3             2              0

b              0            2             3              -1

a.b            0           6             6               0

because a and b  are postive integers

=> (a;b) = (3;2) or (a;b) = (2;3)

=> ab = 6

Step-by-step explanation:

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2 years ago
Rivika used the last four digits of her telephone number,1048, followed by its prime factorization to create her email password
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Answer: I'm pretty sure I can help, just give me like 3 minutes..

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3 years ago
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