# Recent Activity

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1. ### MathLover1 replied to the thread Find Numbers Where f is Discontinuous...2.

at x = 1, f is only on left side, x=1 is a hole, no function on right side=> f is discontinuous at x = 1

May 20, 2022 at 11:14 PM
2. ### MathLover1 replied to the thread Use Continuity to Evaluate Limit...2.

correct you also need to do evaluation to show it's 8

May 20, 2022 at 11:10 PM
3. ### MathLover1 replied to the thread Use Continuity to Evaluate Limit...3.

correct

May 20, 2022 at 11:08 PM
4. ### MathLover1 replied to the thread Find Numbers Where f is Discontinuous...3.

correct

May 20, 2022 at 10:56 PM
5. nycmathguy posted a new thread.

### Use Continuity to Evaluate Limit...3

Calculus Section 2.5 [ATTACH] Question 37 [ATTACH] As x tends to 1, the y-value goes to ln(2) = 0.693147. You say?

#### Forum: Calculus

May 20, 2022 at 10:36 PM
6. nycmathguy posted a new thread.

### Use Continuity to Evaluate Limit...2

Calculus Section 2.5 [ATTACH] Question 35 [ATTACH] As x tends to 2, the y-value goes to 8. The limit is 8.

#### Forum: Calculus

May 20, 2022 at 10:32 PM
7. ### MathLover1 attached a file to the thread Removable Discontinuity...2.

[ATTACH] , so [ATTACH] if x=3, f(x) is undefined and has a hole which we removed so, f(x)=x-4 is continuous

May 20, 2022 at 10:15 PM
8. nycmathguy posted a new thread.

### Find Numbers Where f is Discontinuous...3

Calculus Section 2.5 [ATTACH] Question 45 [ATTACH] At x = 0, I say f is discontinuous. Why? LHL does not equal RHL. At x = 1,...

#### Forum: Calculus

May 20, 2022 at 10:15 PM
9. nycmathguy posted a new thread.

### Find Numbers Where f is Discontinuous...2

Calculus Section 2.5 [ATTACH] Question 43. [ATTACH] I say is discontinuous at x = -1. LHL does not equal RHL. At x = 1, LHL =...

#### Forum: Calculus

May 20, 2022 at 10:10 PM
10. ### MathLover1 replied to the thread Find Numbers Where f is Discontinuous...2.

Question 41? it's not there

May 20, 2022 at 10:08 PM
11. nycmathguy posted a new thread.

### Find Numbers Where f is Discontinuous...2

Calculus Section 2.5 [ATTACH] [ATTACH] Question 41 I see holes, gaps or jumps. I say f is continuous. What about sharp turns? Is a...

#### Forum: Calculus

May 20, 2022 at 10:03 PM
12. nycmathguy posted a new thread.

### Removable Discontinuity...2

Calculus Section 2.5 [ATTACH] [ATTACH]

#### Forum: Calculus

May 20, 2022 at 9:58 PM
13. UmYeah posted a new thread.

### Check my math - electric cars and the grid

I set out for a rough number on how much electricity the USA needs for a 100% electric cars. The answer is a little shocking and hard...

#### Forum: Basic Math

May 20, 2022 at 5:02 PM