Targets on a Line 3

xxxxx xxxxx xxxxxx xxxxxxx, xxxxxxx xx \(x\), \(x\), xxx \(x\), xxxxxx xx xx xxxxxxxxxx xxxx xxxx xxxx xxxxxxxxxx xxxxx \(\xxxxxxx\), \(x\xxxxxxx\), xxx \(x\xxxxxxx\) (xxxxx \(\xxxxxxx << x\)), xxx xxxxxxxx xx xxxxxxxxx \(x_x = -x\), \(x_x = x\), xxx \(x_x = x\), xxx xxxx x xxxxxx xxxxxxxxxxx xx xxxxx x xxxx xx xxx xxxx. xxx xxxx'x xxxxxxx xxxxxxxx xxxxxxx x xxxxxx xxxxxxxxxxxx xxxxxxxx xx x xxxxxx xxxx \(\xx\) xxxx x xxxxxxxx xx \(x\) (\(x \xxx \xxxxxxx{x}(\xx,x)\)). xxxx xxxxxxxxx xx xx xxxxxxxx xxx xxxxxxxxxxx xx xxxxxxx xxx xx xxx xxxxxxx. xxxxxxxxx xxx xxxxx xx \(\xx\) xxxx xxxxxxxxx xxxx xxxxxxxxxxx, xxxxxxxx xxx xxxxxxx xxx xxxxxxxxxxx xx xxxxxxx xx xxxxxx xxx xx xxxxx xxxxx xxxxx.