Can someone answer this
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Given:
Two planks are each 1.5 m long.
One plank is 2.5m long.
To find:
The total length of all the three planks.
Solution:
Two planks are each 1.5 m long. So,
First plank = 1.5 m
Second plank = 1.5 m
One plank is 2.5m long. So,
Third plank = 2.5 m
Now, the total length of all the three planks is
Therefore, the total length of all the three planks is 5.5 m.
Given that 
, we have for 
the Taylor series expansion about 0 as
Replace
with 
, so that the series is equivalent to
and notice that
Recall that for
, we have
which means
Replace
and notice that
Recall that for
which means