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where x ∈ R, y ∈ R is true if and only if- a)x + y ≠ 0
- b)x = y, x ≠ 0
- c)x=y
- d)x≠0, y≠0
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
where x∈ R, y∈ R is true if and only ifa)x + y≠ 0b)x = y,...
sec2θ ≥ 1
4xy/(x+y)2 ≥ 1
⇒(x+y)2 − 4xy ≤ 0
⇒(x−y)2 ≤ 0
⇒ (x−y)2=0
Since (x−y)2 can never be negative
∴ x=y
4xy/(x+y)2 is not defined for
x+y=0
∴x+y≠0
⇒x≠0
⇒2x≠0 or x≠0
Hence x=y, x≠0
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where x∈ R, y∈ R is true if and only ifa)x + y≠ 0b)x = y,...
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