Practice problem
How is ∣a+b∣≤∣a∣+∣b∣|a+b|\leq|a|+|b|∣a+b∣≤∣a∣+∣b∣ derived from a triangle?
One side of a triangle must be less than or equal to the sum of the other two.
One side of a triangle must be less than the sum of the other two.
One side of a triangle must be greater than or equal to the sum of the other two.
One side of a triangle must be greater then the sum of the other two.
Type a concept, like “slope” or “photosynthesis”.
