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mathPad Examples

The following examples illustrate entry of some common expressions.

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Expression

Do this

To display this

A simple expression with integers

Type 2x+52500

2x + 52500

A polynomial with a fractional coefficient

  1. Type 1/2 and press →
  2. Type x^2 and press →
  3. Type +4x+2

one-half x squared plus 4x plus 2

A simple inequality

Type x>=-4

x ≥ -4

An expression with numbers and subscripted variables

  1. Type 1/2 and press →
  2. Type m_2 and press →
  3. Type +4m_3

one half m2 + 4m3

Set notation with fractions

  1. Type (1/9 and press →
  2. Type,2/7 and press →
  3. Type,3/5
(1/9,2/7,3/5)

A square root

  1. Type sqrt

    The square root symbol is created.

  2. Type x

square root of x

A cube root

  1. Click Functions › nth root button
  2. Type 3 and press →
  3. Type x

cube root of x

An expression involving pi and Euler's number

  1. Type pi+
  2. Click Functions › Euler's number button
  3. Type 2

π + e2

A square root

  1. Type sqrt

    The square root symbol is created.

  2. Type gh

square root of g h

A cube root

  1. Click Operations › nth root button
  2. Type 3 and press →
  3. Type m_1 and press →
  4. Type m_2 and press →
  5. Type m_3 and press →

cube root of m1 m2 m3

An expression involving Euler's number

  1. Click Operations › Euler's number button
  2. Type 2

e2

The natural logarithm of an absolute value

  1. Type ln

    A set of parentheses is automatically added and your insertion point is put in the parentheses.

  2. Type |x

    The closing vertical bar is automatically added.

ln(|x|)

An inverse sine

  1. Type sin

    A set of parentheses is automatically added and your insertion point is put in the parentheses.

  2. Press ← and type ^-1
  3. Press →→ and type x

Although you could type arcsin or use the tool button, this example illustrates how you can enter certain functions using the keyboard alone.

sin-1x

A complex number

  1. Type 2+3
  2. Click Symbols › imaginary unit button

2 + 3i

An expression involving hbar (ħ)

  1. Type 3
  2. Click Symbols › h-bar button
  3. Type ^2

3ħ2

A vector in hatted i-j-k form

  1. Type 5
  2. Click Vectors › hat button
  3. Type i and press →
  4. Type +24
  5. Click Vectors › hat button
  6. Type j and press →
  7. Type +4
  8. Click Vectors › hat button
  9. Type k

five hatted i plus 24 hatted j plus 4 hatted k

A vector in vector bracket form

  1. Click Vectors › vector brackets button
  2. Type 12, 15, 22

〈12, 15, 22〉

A vector in bold i-j-k form

  1. Type 5
  2. Click Vectors › i button
  3. Type +24
  4. Click Vectors › j button
  5. Type +4
  6. Click Vectors › k button

5i + 24j + 4k