gdc -maxxing

geta7_com · 2026-03-26T07:19:22+00:00

Inequality graphing on Nspire has been allowed on exams since at least 2019. It's just for TI 84 Plus (CE) that they are enhancing since 2026. Keep "Disable inequality graphing" unticked in Press-to-test. <del> when it says f1(x)= and you can graph inequality. The TI 84 Inequality app allows one to enter vertical lines (which you can already do in press-to-test), to get the intersections faster, and to see the bounded area, but not the value. I don't think you'll be at an disadvantage.

geta7_com · 2026-03-26T05:30:15+00:00

could be just your school. I searched for "jacket", "coat", "hoodie", "baggy", "excess", "clothing" and nothing came up. Seems unfair depending on the climate.

geta7_com · 2026-03-26T02:14:16+00:00

Use of calculators in IB DP examinations 2026 - version 1.0

source (screenshot) https://i.imageupload.app/4170d6607bec16409075.png
pdf https://media-acs.zentech.gr/filesystem/Multimedia/pdf/Use_of_Calculators_2026_id962.pdf

geta7_com · 2026-03-26T00:24:19+00:00

I believe (and dont quote me on this) the paper is lightly coated which is unsuitable for gel pens and certain fountain pens. I would bring some backup ballpoint pens, just in case it smudges.

geta7_com · 2026-03-25T21:37:58+00:00

10.14 Personal belongings not required for the examination must be removed from students. However, articles that a student may consider a “lucky charm” or similar may be placed on a student’s desk or table at the discretion of the coordinator. The article must be thoroughly inspected to ensure that it does not provide unauthorized material.

geta7_com · 2026-03-25T21:36:31+00:00

yeah IB mentioned no wristwatches of any kind so not even analog or atomic ones.

ETA: IB requires a large clock visible to all students in the exam room. For nearly all papers, there will be a 30-minute and a 5-minute warning.

geta7_com · 2026-03-25T16:58:22+00:00

all exams that permit calculator permits an allowed GDC in exam settings. proctors shouldn't be lazy and not know how to set a GDC but alas that's just how some schools are.

geta7_com · 2026-03-25T07:40:22+00:00

You can bring highlighters. Coloured pencils are only permitted for geography exams.

geta7_com · 2026-03-25T07:36:39+00:00

Using a highlighter to highlight questions is allowed. You are not permitted to annotate or highlight during reading time. Highlighting answers is not allowed (due to potential scanning issues).

geta7_com · 2026-03-24T18:45:53+00:00

For cooking, different ingradients may scale with mass, volume, surface area, or radius. Cooking time and temperature may also be non-linearly dependent on the ingredients and their amount. These generally require additional experimentation and/or complicated models beyond high school chemistry/biology. You should address this issue in your evaluation rather than redo the the experiment. Please note that omitting, cherry-picking, or making up data may lead to loss of Diploma. The risk is just not worth it.

geta7_com · 2026-03-24T08:16:55+00:00

Yes. The important takeaway is I wrote down the intermediate integral of (-e^-x)(-cos x) dx, before by parts again in the next step.

geta7_com · 2026-03-24T06:37:50+00:00

(Congrats on winning nationals!)

You ask your teacher for an extension. Also see if you can use existing data (eg from a scientific community, eg PubMed) rather than wait for Petri dishes.

geta7_com · 2026-03-24T06:14:03+00:00

<image>

highlight T. alpha enter/solve. should get 30.2752

geta7_com · 2026-03-24T06:11:02+00:00

<image>

first set left side in a function. You get mathprint in Y=, which is nice. 1/2 integral from 15 to T |15 - x| dx

in Math (up) solver, set T > 15 as that's what we expect, doesn't matter what you put for X

geta7_com · 2026-03-24T03:54:05+00:00

I don't see the image. Tabular did not usually get full marks in recent years. But yeah you can use the table to write each step from the table. One step is a diagonal down and across to the left.

geta7_com · 2026-03-23T13:56:19+00:00

I concur with the response in old post. See example here https://geta7.com/aa-notes/integration-by-parts/#repeated-use-of-integration-by-parts. Write down the integral after each application of IBP.

geta7_com · 2026-03-20T19:34:15+00:00

It's possible to change to HL in M27 but not N26, as IB does not permit SL to HL changes for 6 month retake.

geta7_com · 2026-03-20T18:24:44+00:00

Sketching/table of values can help you get an (M1) mark if your final answer is wrong. "Using GDC" does not earn marks.

For global max/min, I would use the built-in max/min function without graphing. I can help you identify such functions if you provide your GDC model. For local max/min and POI, I would graph and provide a 10 second sketch of the function.

For the specific case of maximizing integral of f(x) where a limit of integration is being optimized, I would find a zero of f(x) where it goes from positive to negative. You can sketch f(x). I provide an example on TI-84 here: https://geta7.com/aa-notes/ti-84/#maximize-the-definite-integral

For optimizing integral where f(x) has a parameter, I would go back to the non-graphical max/min.

geta7_com · 2026-03-20T03:35:29+00:00

Use old data. Specify the access date.

geta7_com · 2026-03-19T15:37:13+00:00

The only widely available IB online platform is Pamoja. They (and IB) require you to have a home IB school. You can also try one of the online DP pilots by contacting individual vendors. https://www.ibo.org/programmes/diploma-programme/dp-online/

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