Derivita

In Derivita, every question has a “Check Answer” button at the bottom. Click this button when you’re ready to submit your answers.

Most assignments give you three tries on each question. If you use up all your attempts, the solution will appear at the bottom. If there are alternate versions of the question, “Check Answer” will change to “Try Similar Question”, and when you click it, you’ll be able to try another version. No matter how many tries it takes you, you’ll still get full credit for the right answer.

Your grade is based on the highest score that you’ve ever gotten on each question, so you can practice a question at any time without lowering your grade.

You can complete the questions in any order. When you’re ready to move on, navigate to another question with the “Back” and “Next” buttons, or by choosing one from the list of questions.

Enter the word text{Study}Study in the box below, then click “Check Answer”. The preview window next to the input box will show you how your answer is being understood by the computer. Use it to make sure that your answer looks the way that you expect.

For example, a question may ask you to enter text{None}None if no solution exists. If you accidentally entered text{Nine}Nine, the preview window would show this: N cdot i cdot n cdot eN⋅i ⋅n⋅e.

Enter the word text{None}None below. Notice that the preview window changes as you type, and it shows up correctly once your input is recognized.Derivita can accept many types of answers, including expressions, equations, lists, and more.

a) Enter an equation.
Equation
Preview

b) Enter a list of three values. Separate the items in your list with commas.If your answer contains an error that keeps Derivita from understanding what you entered, the preview will show text{Invalid Input}Invalid Input.

Here are some reasons you might see text{Invalid Input}Invalid Input when entering a number, expression, or equation:
Entering symbols that aren’t allowed, like backslash, $$, or ##
Using commas where they aren’t allowed, like in large numbers. When entering a long number like 1{,}234{,}5671,234,567, for example, leave out the commas and enter only 12345671234567
Having unmatched parentheses. For example, (1 + 3(1+3 is invalid because it’s missing the closing parenthesis.
a) Try typing in some examples, and note that text{Invalid Input}Invalid Input shows up in the preview.
When you’re done experimenting, enter text{Done}Done.To enter a fraction, type / for the division, or choose frac{a}{b}
b
a

from the toolbar.

a) Enter the fraction displaystyle frac{4}{23}
23
4

.
Fraction
Preview

If the numerator or denominator uses multiple symbols, make sure to put parentheses around the entire numerator or denominator.
Hint: To see whether your answer is read the way you intended, look at the preview window.

b) Enter the fraction displaystyle frac{4+x}{y+9}
y+9
4+x Unless the question tells you to simplify your answer, you’ll get full points for any answer that’s equal, even if it looks different.

For example, if the answer to a question were displaystyle frac{3}{7}
7
3

, you could also enter displaystyle frac{9}{21}
21
9

or displaystyle frac{3+0}{7cdot 1}
7⋅1
3+0

.

Enter any three different expressions that are equal to displaystyle frac{1}{4}+frac{5}{4}
4
1

+
4
5

.

Expression 1
Preview

Expression 2
Preview

Expression 3
Preview

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