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mote1985 [20]
2 years ago
14

How to solve this? Is the question correct? ty :)

Mathematics
1 answer:
bezimeni [28]2 years ago
4 0

Answer:

The proposition is true.

Step-by-step explanation:

Now we proceed to demostrate that expression given is true by algebraic means:

1) \frac{x^{-1}+y^{-1}}{x^{-1}}+\frac{x^{-1}-y^{-1} }{y^{-1}} Given

2) \frac{y^{-1}\cdot (x^{-1}+y^{-1})+x^{-1}\cdot (x^{-1}-y^{-1})}{x^{-1}\cdot y^{-1}}   \frac{a}{b} + \frac{c}{d} = \frac{a\cdot d+b\cdot c}{b\cdot d}

3) \frac{x^{-1}\cdot y^{-1}+y^{-2}+x^{-2}-x^{-1}\cdot y^{-1}}{x^{-1}\cdot y^{-1}} Distributive property/a^{b}\cdot a^{c} = a^{b+c}

4) \frac{x^{-2}+y^{-2}}{(x\cdot y)^{-1}} Commutative, associative and modulative properties/Existence of additive inverse/a^{b}\cdot c^{b} = (a\cdot c)^{b}

5) [(x\cdot y)^{-1}]^{-1}\cdot (x^{-2}+y^{-2}) Commutative property/Definition of division

6) (x\cdot y)\cdot (x^{-2}+y^{-2})         (x^{-1})^{-1}

7) x^{-1}\cdot y + x\cdot y^{-1} Distributive property/Associative property/a^{b}\cdot a^{c} = a^{b+c}

8) (x^{-1}\cdot y^{-1})\cdot y^{2} + (x^{-1}\cdot y^{-1})\cdot x^{2}  Modulative property/Existence of additive inverse/a^{b}\cdot a^{c} = a^{b+c}

9) (x^{-1}\cdot y^{-1})\cdot (x^{2}+y^{2}) Distributive property

10) (x\cdot y)^{-1}\cdot (x^{2}+y^{2}) a^{b}\cdot c^{b} = (a\cdot c)^{b}

11) \frac{x^{2}+y^{2}}{x\cdot y} Commutative property/Definition of division/Result

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Is 3/9 a function of y Equals 6X
sdas [7]

Answer:

yes

Step-by-step explanation:

well plug it in: y=6x -> y=6(3/9) and solve, yes if theres a slope of 1

5 0
3 years ago
Multiply me by 4 then subtract 13 if you divide me by 3 and add 17 you get 22
8_murik_8 [283]
You have to do the opposite

22-17=5
5x3=15
15+13=28
28/4=7

The answer is 7. You can check this by doing what it says and if it makes 22, it’s correct. (I’ve already checked it) :)
6 0
3 years ago
A square has a diagonal of length 12. Find the length of each side.
White raven [17]

Answer:

3

Step-by-step explanation:

12÷4=3

Hope this will help you!

7 0
2 years ago
The table of values represents a quadratic function. What is the average rate of change for f(x) from x = 0 to x = 10 ? Enter yo
Elena-2011 [213]
By definition we have that the average rate of change is given by:
 AVR = (f (x2) - f (x1)) / (x2 - x1)
 Substituting the values we have:
 AVR = (204 - (-6)) / (10 - 0)
 Rewriting we have:
 AVR = (204 + 6) / (10 - 0)
 AVR = 210/10
 AVR = 21
 Answer:
 
the average rate of change for f (x) from x = 0 to x = 10 is:
 
AVR = 21
8 0
3 years ago
How can you tell that −10 and −20 are solutions to this inequality, but 10 is not? 3n − 40 < −5n + 8
pochemuha

Step-by-step explanation:

-10 or -20 satisfies the equation.

But when you substitute 10 in:

30-40<-50+8

-10<-42(wrong)

it's wrong

6 0
3 years ago
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