5-4-44
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00:00
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We need to find the total area of the region between the X axis
and the graph of Y equal X to the 1/5 -, X from -1 less than
or equal to X less than or equal to 9.
So we're going to set 0 equal to X to the 1/5 -, X We're going to
factor out the X to the one fifth.
We always take out the lowest exponent, 1/5 is lower than one.
Then we're going to set each of those terms equal to 0.
So we get X = 0 and 1 -, X to the 4/5 = 0.
So we get X = 0 and X equal 1.
So we're going to subdivide this up into three different
intervals.
We're going to have -1 to 0.
We're going to have zero to one.
We're going to have 1:00 to 9:00.
When we do that, we need to think about whether we're above
the X axis or below the X axis.
From -1 to 0 we're going to be below.
So we're going to take the opposite of that from zero to
one, we're above, so it's going to be positive from 1:00 to
9:00.
We're going to be below, so we're going to subtract or take
the opposite of it.
Taking the integration of each of those, we get negative 5-6 X
to the six fifths plus 1/2 X squared from -1 to 0 plus 56X to
the six fifths -1 half X ^2 from zero to 1 + -5 six to the six
fifths plus 1/2 X squared from 1:00 to 9:00.
Putting in our upper bound minus our lower bound.
And I grabbed a calculator.
29.86 is approximate area.