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gabby7398
08.07.2021 •
Mathematics
Can ya’ll help me out
Solved
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Ответ:
Step-by-step explanation:
Ответ:
Step-by-step explanation:
For solving the question first we need to revise the properties of inequality,
a < b ⇒ a ± c < b ± c ∀ a, b, c ∈ R,
a < b ⇒ ca < cb if c > 0,
a < b ⇒ ca > cb if c < 0
Part 1 :
Given,
x and y are two numbers ( must be positive real numbers because they are showing the heights )
Such that, x > y,
Adding x on both sides of the inequality,
x + x > y + x
2x > y + x
⇒ x + y < 2x
Thus, SECOND option is correct.
Part 2 :
∵ x > 0 ⇒ 1/x > 0,
x > y
⇒![\frac{x}{x} \frac{y}{x}](/tpl/images/0361/3091/425df.png)
Similarly, y > 0 ⇒ 1/y > 0
From equation (X) and (Y),
Thus, FIRST option is correct.
Part 3 :
Now, x > y
x + y > 2y
Since, y > 0 ⇒![\frac{1}{y} 0](/tpl/images/0361/3091/73bb5.png)
Thus, FIRST option is correct.