Choose a mathematical formula question sub-type | Möbius product documentation

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Choose a mathematical formula question sub-type

There are ten sub-types to choose from when authoring a mathematical formula question.

Each sub-type has unique syntax requirements of how the Answer field value is defined while authoring.

NOTE: In general, the ten mathematical formula question sub-types accept equivalent responses. However, here are some special notes for equivalent responses and specific sub-types:

The formula without logs and trig sub-type won't accept logarithmic and trigonometric functions as equivalent responses.
The formula with physical units sub-type will accept unit equivalents as long as the units are recognized by Möbius.
The formula that matches responses to within +C sub-type accepts two answers as equivalent if they differ by a constant number.
The formula without simplification sub-type will only accept unsimplified responses as equivalent responses.
The equation sub-type will accept any equation that's algebraically equivalent to the correct answer.
The chemical formula sub-type doesn't accept equivalent responses and requires the student response to be an exact match to the defined correct answer.

Formula

The formula sub-type accepts numbers, formulas, and operations, but not equations.

Examples of accepted syntax for defining the Answer field value for this sub-type are:

(e^x)*sin(x^2)
5*x^4

Check out Author a formula sub-type.

Formula without logs and trig

The formula without logs and trig sub-type accepts numbers and formulas without logarithms or trigonometric functions.

Examples of accepted syntax for defining the Answer field value for this sub-type are:

1/sqrt(2)
(1/3)*3^(1/2)

Check out Author a formula without logs and trig question sub-type.

Formula with physical units

The formula with physical units sub-type accepts a combination of numeric quantities, algebraic formulas, unit dimensions, and physical units.

Examples of accepted syntax for defining the Answer field value for this sub-type are:

6 mg
2*t m/s
sin(x) m/s^2
(3*t^2+1) km/hr

Check out Author a formula with physical units question sub-type.

Formula that matches responses to within +C

The formula that matches responses to within +C sub-type accepts numbers and formulas as answers within a constant number of the defined correct answer.

Examples of accepted syntax for defining the Answer field value for this sub-type are:

x*ln(x)
x*ln(x) +1
(4/3)*x^3 + (7/5)*x^5 + (11/7)*x^7

Check out Author a formula that matches responses to within +C sub-type.

Formula without simplification

The formula without simplification sub-type accepts only the exact formula provided, and doesn't accept any simplification of student responses.

Examples of accepted syntax for defining the Answer field value for this sub-type are:

4*x+x
3*x^2+9*x+10

Check out Author a formula without simplification sub-type.

Equation

The equation sub-type accepts responses that use an = symbol, where the equation can be expressed in terms of a single variable.

Examples of accepted syntax for defining the Answer field value for this sub-type are:

y = 7*x+2
y = 4*(x+1) +2
y = 8*(x-2) + 7

Check out Author an equation sub-type.

Unordered list of formulas

The unordered list of formulas sub-type accepts an unordered list of numbers or formulas separated by semicolons (;).

Examples of accepted syntax for defining the Answer field value for this sub-type are:

4; 5*x; 3
(-5/2)+(1/2)*19^(1/2); (-5/2)-(1/2)*19^(1/2)

Check out Author an unordered list of formulas sub-type.

Ordered lists of formulas

The ordered lists of formulas sub-type accepts an ordered list of numbers or formulas separated by commas (,).

Examples of accepted syntax for defining the Answer field value for this sub-type are:

2, 4, 8, 16
sqrt(3)/2, 1/2, sqrt(3)

Check out Author an ordered lists of formulas sub-type.

Vectors of formulas

The vectors of formulas sub-type is used for questions about Cartesian coordinates or vectors.

Examples of accepted syntax for defining the Answer field value for this sub-type are:

(2, 5)
(2, 4*t, 7*t+1)

Check out Author a vector of formulas sub-type.

Chemical equation

The chemical equation sub-type is used for chemistry questions involving chemical equations.

Examples of accepted syntax for defining the Answer field value for this sub-type are:

H_2SO_4
2H_2+O_2 -> 2H_2O

Check out Author a chemical equation sub-type.