README (not visible to students)

This question demonstrates the ability of <pl-image-capture> to let students submit captured images from their webcam or external device, such as a phone or tablet. The question also demonstrates what <pl-image-capture> looks like when mobile capture is disabled.

The first part of the question requests the derivative f'(x) of a function f(x), along with work shown step-by-step and submitted through pl-image-capture. The second part of the question requests a sketch of the region bounded by two curves.

Element pl-image-capture: Capture image from webcam or mobile device

This question demonstrates the image capture element, which enables students to submit images to questions using their local camera or an external device (e.g. a phone or tablet).

If you plan to use AI grading, do not wrap pl-image-capture within another PrairieLearn element, such as pl-card.

Consider the function $f(x) = arcsin(2x) + cos(4x^3-5x)+e^{x^3}$. Find $f'(x)$ and show your work.

Image capture

Make sure your photo is clear, well-lit, and shows all your work legibly.
Later, you can crop or rotate the image as needed.

Captured image

If necessary, mobile capture can be disabled.

Sketch the bounded region enclosed by the curves $y=-x^2+3$ and $y=2x^2$.

Image capture

Make sure your photo is clear, well-lit, and shows all your work legibly.
Later, you can crop or rotate the image as needed.

Captured image

If allow-blank is set, students can submit without capturing an image. This is useful when providing multiple image capture elements where not all are required.

Use this space for additional work (optional).

Image capture

Make sure your photo is clear, well-lit, and shows all your work legibly.
Later, you can crop or rotate the image as needed.

Captured image

Correct answer

Student view placeholder

In student views this area is used for assessment and score info.
Tools

Staff information

Question

QID:
Title:
Element pl-image-capture: Capture image from webcam or mobile device

Variant

Started at:
2026-08-04 22:48:56 (CDT)
Duration:
0s
Show/Hide answer 
{}
This box is not visible to students.
History
dec frac
rad deg