Proof Theory for all real numbers

[cannibal]

[SOLVED] Proof Theory for all real numbers

Homework Statement

If a and b are real numbers, we define max {a, b} to be the maximum of a and b or the common value if they are equal.

Prove that for all real numbers d, d1, d2, x, If d = max {d1, d2} and x ≥ d, then x ≥ d1 and x ≥ d2.

Homework Equations

The Attempt at a Solution

I do not know how to even start this problem, i have a small feeling that this exercise has something in relation with the "Logic and propositional calculus topic" but i have not find out were to link it. Any hint or good start will be appreciated.

Thanks

 

[HallsofIvy]

Why in the world is this in "Engineering, Computer Science, and Technology"? Looks like a straightforward math problem to me. First, we have, from the definition, max(d_1,d_2)\ge d1 and max(d_1,d_2)\ge d2. It follows immediately that if x\ge max(d1,d2) then x\ge d1 and x\ge d2.

 

[cannibal]

Thank you very much "HallsofIvy" i put it here since its a "Computer Science Class" at my college, I am currently studying "Computer Engineer" and i have to take this class.

Thanks!