Question

va rog 50 de puncte + coroana

Answer 1

Daca x≥√2 avem: |x-√2|=x-√2
Rezulta: |x+√2|+|x-√2|=x+√2+x-√2=2x

Daca x<√2 avem: |3x-√18|=|3x-3√2|=3√2-3x
Rezulta: |3x-√18|+|3x+√18|=3√2-3x+3x+3√2=6√2

Spor la lucru! 

Answer 2

a)Daca x ≥√2, atunci |x+√2|+|x-√2|= x + √2 + x -√2 = 2x (+√2 si -√2 se reduc)
b)|3x - √18| + |3x + 18| = |3x - 3√2| + |3x + 3√2|
Daca |x| < √2, atunci |3x - 3√2| + |3x + 3√2| = -3x + 3√2 + 3x + 3√2 = 6√2 (-3x si +3x se reduc)