\(C=\left|x+3\right|+\left|x-5\right|=\left|x+3\right|+\left|5-x\right|\ge\left|x+3+5-x\right|=\left|8\right|=8\)
dấu"=" xảy ra\(< =>-3\le x\le5\)
Giải:
C=|x+3| + |x−5| = |x+3| + |5−x| ≥ |x +3 + 5 − x| = |8| = 8C = |x+3| + |x−5| = |x + 3| + |5 − x| ≥ |x + 3 + 5 − x| = |8| =8
Dấu "=" xảy ra <=> −3 ≤ x ≤5 <=> −3 ≤ x ≤5
Giải:
C=|x+3| + |x−5| = |x+3| + |5−x| ≥ |x +3 + 5 − x| = |8| = 8C = |x+3| + |x−5| = |x + 3| + |5 − x| ≥ |x + 3 + 5 − x| = |8| =8
Dấu "=" xảy ra <=> −3 ≤ x ≤5 <=> −3 ≤ x ≤5
