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Calculated Formula “Logarithm to Base n” Inserted Using the Math Editor Cannot be Evaluated

When using a calculated formula, the “Logarithm to base n” does not calculate, and the question cannot be created using the formula.

Description

When using a calculated formula, the “Logarithm to base n” does not calculate, and the question cannot be created using the formula.

Steps to Replicate

  1. Log in to Blackboard Learn Ultra Experience as an Administrator

  2. Create a new Ultra Course.

  3. Create a test

  4. Create a calculated formula.

  5. In “*Question Text” you can use [x]

  6. In “*Enter the answer formula” Go to the calculus tab (alt+9 in windows)

  7. Select “Logarithm to base n” -> set log2(x) and hit next

  8. In “Rounding” Decimal places = 3 (you can set it with no decimals but the answers are more understandable with decimals)

  9. In “Variable ranges” MINIMUM=1 MAXIMUM=5 DECIMAL PLACES =0 Number of answer sets = 5 and hit next

Observed Behavior:

In verification step, each answer shows “Unable to calculate row”

Expected Behavior:

Answers should appear:

log2(1) = 0

log2(2) = 1

log2(3) = 1.585

log2(4) = 2

log2(5) = 2.322

Affected Versions

  • Learn 4000.8.0

  • Learn 4000.10.0

  • Learn 4000.12.0

Target Release

Future Reference

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