Brainteaser - Targets on a Line 2

xxxxx xxx xxxxxx xxxxxxx, x xxx x, xxxx xxxx x xxxxxx \(\xxxxxxxxxx << x\), xxxxxx xx xx xxxxxxxxxx xxxx xxxx. xxx xxxxxxx xxx xxxxxxxx xx \(x_x = -x\) xxx \(x_x = x\), xxxxxxxx xxx xxxxxxxxx \([x-\xxxxxxxxxx, x+\xxxxxxxxxx]\) xxx \([x-\xxxxxxxxxx, x+\xxxxxxxxxx]\) xxxxxxxxxxxx. xxx xxxx xxx xxxx xx xxxxx xx xxx xxxx, xxxxxx xx xxxxxxxx xxxx xxxxxxxxxxx xx xxxxxxx x xxxxxx. xxx xxxx'x xxxxxxx xxxxxxxx xxxxxxx x xxxxxx xxxxxxxxxxxx \(x(\xx, x)\), xxxxxxxx xx \(\xx\). xxxx xxxxx xx \(\xx\) xxxxxxxxx xxxx xxxxxxx xx xxxxxxx x xxxxxx?