Maths Using e and intergration
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Maths Using e and intergration

[From: ] [author: ] [Date: 12-07-08] [Hit: ]
you integrate over the interval taking the upper bound minus the lower bound.So, the interval is 0, 1.We have 6 times (1/3)e^(3x) evaluated from 0 to one plus (2/3)x^(3/2) evaluated from 0 to 1.2(e^3x) evaluated from 0 to 1 + (2/3)x^(3/2) evaluated from 0 to 1.......
a curve has equation y = 6e^(3x) + x^(1/2) where x >= 0
The region bounded by the curve, the coordinate axis and the line with equation x = 1 is R
Calculate the area of R

I have no idea where to start with this one...
How to intergrate this? Do i need to find the maximum point to before I can intergrate?
Im really stuck!
Please someone walk me through this step by step!

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To find the area of R, you integrate over the interval taking the upper bound minus the lower bound.

So, the interval is 0, 1.

Int_(0 to 1)_(6e^3x) + x^(1/2) dx

Split the integral at the + sign and take the constants out of the integrals

6Int_(0 to 1)_(e^3x)dx + Int(0 to 1)_(x^(1/2))dx

We have 6 times (1/3)e^(3x) evaluated from 0 to one plus (2/3)x^(3/2) evaluated from 0 to 1.
If we take the 1/3 out of the first term:
2(e^3x) evaluated from 0 to 1 + (2/3)x^(3/2) evaluated from 0 to 1.

2[ e^3(1) - e^3(0) ] + [2/3 - 0]
2[ e^3 - 1 ] + 2/3
2e^3 - 2 + 2/3
2e^3 - 4/3
2[ e^3 - 2/3 ]
1
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