1] Let X,YER. Prove that VxVy(4x+9y>9⇒(x>5/4 Vy> 4/9)) using method of indirect proof.
1] Let X,YER. Prove that VxVy(4x+9y>9⇒(x>5/4 Vy> 4/9)) using method of indirect proof.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![1] Let x,yER. Prove that
VxVy(4x+9y>9⇒(x>5/4 Vy> 4/9)) using method of indirect proof.
(x>11/10 v y>10/21))
2] Let X,YER Prove that VxVy(10x+21y>21
4] Let x, YER Using proof by contradiction, prove that VxVy(512y3+8x²y<x³+64y²x+8y≤x)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb0e96a87-a70e-4b73-bc04-464704ccb570%2F4af7a72d-2f4b-4c88-b4f9-0ce7b0c503ba%2F63d7hgi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1] Let x,yER. Prove that
VxVy(4x+9y>9⇒(x>5/4 Vy> 4/9)) using method of indirect proof.
(x>11/10 v y>10/21))
2] Let X,YER Prove that VxVy(10x+21y>21
4] Let x, YER Using proof by contradiction, prove that VxVy(512y3+8x²y<x³+64y²x+8y≤x)
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