Answer
the largest is ||p||=1.2
Work Step by Step
$|x_1 -x_o|$=| 1.2-0 | =1.2
$|x_2 -x_1|$=|1.5-1.2|=0.3
$|x_3 -x_2|$=|2.3-1.5| =0.8
$|x_4 -x_3|$=|2.6-2.3|=0.3
and
$|x_5 -x_4|$=|3-2.6|=0.4
The largest is $||p|| =1.2$
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