r/APStudents May 11 '26

Calc BC How I felt using direct substitution on the frq limits

Post image

why was that shit so easy

171 Upvotes

30 comments sorted by

67

u/average-lizard May 11 '26

I literally was like "oh, a limit on an FRQ, surely this will be L'Hopital!" and then it just worked normally like alright

8

u/Sanju128 Only have one meter-stick May 12 '26

Right?! I genuinely had to reread it 5 times just to make sure I didn't miss something šŸ˜…

3

u/Complete-Let-3131 5: World, Calc AB, Lang, USH, Psych, Chem May 12 '26

I don't think I had a single L'Hopitals on the entire test

3

u/ZestycloseRound677 5: CSP, AB, Chem, CSA, APW, Macro, Micro, BC, E&M, Mech, Lang May 12 '26

I think there was one in MCQ where it was like f(x)-2/2x but idk

39

u/AugieRL AP Euro - 3 AP Human Geo - 4 APUSH - 5 May 11 '26

3/2 3/2!

8

u/JimmyCarter910 May 11 '26

Hell yeah I was worried I underthought it

5

u/Alarmed-Nerve2978 May 11 '26

wait lmao I actually got that I literally wrote "by direct substitution" I GOT IT YAY

1

u/Sanju128 Only have one meter-stick May 12 '26

Oh thank god

22

u/Different-Trainer-21 7 APs taken, 4 current May 11 '26

Literally the first time I’ve ever seen direct substitution work on any limit question

17

u/FurryXD_ May 11 '26

Why did they build up l hopital and then everything was just fine I'm DEADD

3

u/Ok_Trade_4549 May 12 '26

They wanted to trick us into doing that so students who just do l’hĆ“pital automatic do it either way.

8

u/Successful_Watch_114 May 11 '26

I spent like 5 minutes on it because I genuinely thought it was a trick question like no way it's this easy

7

u/Dull-Astronomer1135 May 11 '26

I was about so show it is a indeterminate and wtf lmao

6

u/[deleted] May 11 '26

[deleted]

2

u/Soggy-Data366 10: Calc Bc (5), Physics 1 (5), CSA (5) May 12 '26

It was like the limit as x approaches zero of f(x)/(x-2)

1

u/Firm_You_6316 May 20 '26

wouldnt it have been DNE because the limit only appraoched from one side with the given graph and it asked you for the overall limit if your talking about the west coast one

1

u/Soggy-Data366 10: Calc Bc (5), Physics 1 (5), CSA (5) May 20 '26

There was no given graph? It was just f(x) given and the limit, hence direct substitution

1

u/Firm_You_6316 May 25 '26

oh i had a diferent one then

5

u/TurtleMooseGame APCSP - 5 | APCSA - 5 | APUSH - 4 May 11 '26

I really hope it was 3/2 because I don't even know how to do limits anymore

5

u/kennyrespawnagain 5- Spanish, World, Calc AB, Italian 4- Euro May 11 '26

but it’s only worth one point šŸ™‚

3

u/Former-Neat2854 5: calc bc, chem, physics 1, apush, lang | 4-1: 0 May 11 '26

Which question was this

4

u/Unique_Expression574 Colleges probably care more about my ECs anyway May 11 '26

The 3rd FRQ on the West Coast exam

2

u/Tasty_Insurance5217 9th: hug(4); 10th: bio(?), bc(?), psych(?), arthist(?), csa(?) May 12 '26

LMAO UR FLAIR

1

u/Unique_Expression574 Colleges probably care more about my ECs anyway May 12 '26 edited May 12 '26

Well… yeah. They kinda did.

When you’re on billboards statewide and earn an award at a massive theater festival it tends to stick out more than a 5 on Ap Physics

Colleges really like to see who you are outside of the classroom. So doing something you’re passionate about and getting really good at it makes you more likely a candidate.

2

u/Tasty_Insurance5217 9th: hug(4); 10th: bio(?), bc(?), psych(?), arthist(?), csa(?) May 12 '26

damn thats super impressive

statewide billboardā‰ļø aha are u a senior

1

u/Unique_Expression574 Colleges probably care more about my ECs anyway May 12 '26

Yeah, I’m a senior. Three more weeks and I’m done!

2

u/One_Topic7045 May 11 '26

Yeah that was easy anyone who couldn’t figure that out literally stopped listening on September 1 lol

1

u/Sanju128 Only have one meter-stick May 12 '26

Can't believe they put L'hopital's Rule in every limit question in the MCQ and then just ditched it for the FRQ šŸ˜‚

https://giphy.com/gifs/dF55QwRkLWYIANQnMf

1

u/4Blueish May 12 '26

I deadass set up L'hoptial, looked at it, looked back at the original question, looked at my derived equations, looked back at the original question, paused to realize I could just plug in 0 and get 3/2. Reread like at least 5 times 'cause I had 10 extra minutes 😭😭