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how to find the limit math. Look for example at the function fx sqrtx 2x. Lim x 2 x 2 4 x 12 x 2 2 x 0 0 lim x 2 x 2 4 x 12 x 2 2 x 0 0.
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So we cant just plug in x 2 x 2 to evaluate the limit. Find limits at infinity. By using the fundamental theorem of calculus.
The first limit is clearly infinity and for the second limit well use the fact above on the last two terms.
Lim x1 x21 x1 2 So it is a special way of saying ignoring what happens when we get there but as we get closer and closer the answer gets closer and closer to 2. Its actually very similar if you are finding the limit of a root function. It cannot be simplified to be a finite number. In this video Ill show you how to find the limit of a function involving infinity by looking at key features in its equation.
