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Integration by finding limits? 
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#1
May609, 07:45 AM

P: 1

Hi Guys, im having a huge problem with integration at the moment and dont know how to approach it cause i have a lousy teacher who couldnt be bothered in actually doing examples on the board. The equation is given as this:
f(t) = 2^t + t^2 Using the equation find the area under the curve between 0 and 1 using: 1) finding certain limits and 2) Fundamental theorem of calculus. I know how to do 2 as integrating the equation yields 2^t/ln2 + t^3/3 and then sub in the numbers for 1 and 0 and subtract. Problem is i cant do part 1! Can someone help me with this im desperate. My test is tomorrow!!! Your contribution is much appreciated. Thanks 


#3
May609, 02:56 PM

P: 290

[tex]\int_a^b{f(x)}\, \text{d}x = \lim_{n \to \infty}{\sum_{i=1}^n{f(x_i)} \Delta x[/tex]
Is the definition of an definite integral. If she said to find the limit then it seems like she doesn't want you to estimate with a large n value, but to actually find the limit of the sum. 


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