# LIMITS AND CONTINUITY PDF

A guide for teachers – Years 11 and 1. 2. 3. 4. 5. 6. 7. 8. 9. Supporting Australian Mathematics Project. Calculus: Module 8. Limits and continuity. Limit and Continuity. However, in this case f(x) is not defined at x = 1. The idea can be expressed by saying that the limiting value of f(x) is 2 when x approaches . In this chapter we shall study limit and continuity of real valued functions defined Definition Let D ⊆ R and a ∈ R. Then a is said to be a limit point of D.

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The conventional approach to calculus is founded on limits. Continuity of a function (at a point and on an interval) will be defined using limits. PDF), p More elaborately, if the left hand limit, right hand limit and the value of the function Continuity of some of the common functions. Function. To evaluate the limits of trigonometric functions, we shall make use of the limits in a rather direct fashion, we expect the rules of derivatives to.

Sample answers given.. Sketch a function with the property that f a eists but lim f does not eist.

Sketch a function with the property that f a eists and lim f eists but lim f f a. All rights reserved.

## Thus we see that x→3 implies x→3+ and x→3- both.

D 95 AB5 Since the limit is taken as n and the eponents in the numerator and denominator are n equal, use the ratio of the leading coefficients to find that the limit is n.. B 9 AB9 This limit represents the derivative of the function, f tan3. Using the chain rule, f 3sec 3.

B BC appropriate for AB lim 0 7. B 9 AB3 Since f cos, f sin. C AB9 cos cos cos lim lim lim lim. Visit us online at 3 Limits, Continuity, and Differentiability 9. E 95 AB Using the given limit, there is not enough information to establish that f a eists, nor that f is continuous or defined at a, nor that f a L.

For eample, consider the function whose graph is the horizontal line y with a hole at a. For this function lim f and none of the given statements are true a 0.

So to take the limit of a sum or difference all we need to do is take the limit of the individual parts and then put them back together with the appropriate sign. This is also not limited to two functions.

## Btech 1st Sem: Maths: Limit,Continuity & Differentiability

We take the limits of products in the same way that we can take the limit of sums or differences. Just take the limit of the pieces and then put them back together. Also, as with sums or differences, this fact is not limited to just two functions. As noted in the statement we only need to worry about the limit in the denominator being zero when we do the limit of a quotient.

## Limit of a Function of Two Variables

If it were zero we would end up with a division by zero error and we need to avoid that. In this property n can be any real number positive, negative, integer, fraction, irrational, zero, etc.

In the case that n is an integer this rule can be thought of as an extended case of 3. Non-Removable Infinite Discontinuity If for some function f at c, lim f or lim f or lim f or lim f f has a non-removable infinite discontinuity at c.

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Page 8 of 11 9 Eample Evaluate for each of the following functions: P. Don t use a calculator if you don t have to. You don t have to.

Page 9 of 11 10 There is one last type of discontinuity that can be a little triggy. It s called an oscillating discontinuity.

## Limit of a function

Eample Eamine f 1 sin zooming in around 0 in the vicinity of 0. Verify your results by graphing the function and. What is lim f?

Additionally, you ve no doubt become aware of how important both the limit value and the function value are important to the idea of continuity at a point.

When looking for a limit value at c, imagine that you ve got a thick vertical line covering up c with only the graph showing on either side of c.

## Questions on Continuity with Solutions

You are now looking to see what y- value s the graph is approaching on either side of c. If the graphs appear to be approaching the same y-value, the limit eists and is that y-value.

Otherwise, the limit does not eist there. When looking for a function value at c, imagine that you ve got shudders up on either side of c with only the vertical sliver at c visible between them.Using the chain rule, f 3sec 3.

Weierstrass first introduced the epsilon-delta definition of limit in the form it is usually written today. B BC appropriate for AB lim 0 7.

She reports back that indeed she can get within ten meters of L, since she notes that when she is within fifty horizontal meters of p, her altitude is always ten meters or less from L.

E AB3 By definition of a horizontal asymptote, E is correct.. If you were to build the bridge, would you know eactly where to build it to make crossing the chasm in a car a continuously smooth undertaking?

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