# Help with a CL Question

**URL:** <https://cl.desmos.com/t/help-with-a-cl-question/7336>\
**Category:** Questions\
**Created:** [September 30, 2024, 3:39pm UTC](https://cl.desmos.com/t/help-with-a-cl-question/7336 "2024-09-30T15:39:28Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Douglas\_Blose](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/douglas_blose/32/6083_2.png) [@Douglas\_Blose](https://cl.desmos.com/u/Douglas_Blose)\
**Post date:** [September 30, 2024, 3:39pm UTC](https://cl.desmos.com/t/help-with-a-cl-question/7336/1 "2024-09-30T15:39:28Z")

</div>

In this activity, I would like students to type the domain and range of the function using interval notation. The domain seems to be working but I cannot get the range to accurately mark correct. Can someone help?

> **[\[Copy of\] Quadratic Function Review • Activity Builder by Desmos Classroom](https://teacher.desmos.com/activitybuilder/custom/66faac35cee57589667c78a5)**
>
> by Douglas Blose

---

<div class="post-metadata">

**Author:** ![SteinSchreiber](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/steinschreiber/32/2267_2.png) [@SteinSchreiber](https://cl.desmos.com/u/SteinSchreiber)\
**Post date:** [October 1, 2024, 2:32pm UTC](https://cl.desmos.com/t/help-with-a-cl-question/7336/2 "2024-10-01T14:32:35Z")

</div>

I do not think desmos or LaTex allows the use of mixed symbols in interval notation such as [1,7) etc. I worked around this using buttons. See this activity.

> **[Interval Notation using buttons(mc) • Activity Builder by Desmos Classroom](https://teacher.desmos.com/activitybuilder/custom/60a2b4f0d20f7a4920fbe81f)**
>
> Allows students to enter answer that is a single and double intervals including following options:
> \`\\left\[,\\right\]\\ \\&\\ \\left(,\\right\]\\ \\&\\ \\left\[,\\right)\\ \\&\\ \\left(,\\right)\`
> also can use \`-\\infty\\ \\ \\&\\ \\infty\`
> Put the answers in the hidden...

---

<div class="post-metadata">

**Author:** ![Douglas\_Blose](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/douglas_blose/32/6083_2.png) [@Douglas\_Blose](https://cl.desmos.com/u/Douglas_Blose)\
**Post date:** [October 1, 2024, 7:00pm UTC](https://cl.desmos.com/t/help-with-a-cl-question/7336/3 "2024-10-01T19:00:28Z")

</div>

That is definitely a useful workaround for this issue. Thank you so much.

---

<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/desmos/original/2X/f/f5bd144684474e9a2f333002cde9840e52c5dbd3.png) [@system](https://cl.desmos.com/u/system)\
**Post date:** [October 3, 2024, 7:01pm UTC](https://cl.desmos.com/t/help-with-a-cl-question/7336/4 "2024-10-03T19:01:14Z")

</div>

This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.