With Σ(, you can obtain the sum of an input f(x) expression for a specific range.

Input Syntax

The input syntax depends on the Input/Output setting on the SETTINGS menu, as shown in the table below.

* a and b are integers that can be specified within the range of -1 × 1010 < a ≤ b < 1 × 1010.

Σ Calculation Example

(x + 1) = 20

(Input/Output: MathI/MathO)

• – [Func Analysis] > [Summation(Σ)]
  115
• 

(Input/Output: LineI/LineO)

• – [Func Analysis] > [Summation(Σ)]
  1(,)1(,)5
• 

With ∏(, you can obtain the product of an input f(x) expression for a specific range.

Input Syntax

The input syntax depends on the Input/Output setting on the SETTINGS menu, as shown in the table below.

* a and b are integers that can be specified within the range of a < 1 × 1010, b < 1 × 1010, a ≤ b.

∏ Calculation Example

(x + 1) = 720

(Input/Output: MathI/MathO)

• – [Func Analysis] > [Product(Π)]
  115
• 

(Input/Output: LineI/LineO)

• – [Func Analysis] > [Product(Π)]
  1(,)1(,)5
• 

Use (log) or – [Func Analysis] > [Logarithm(log)] to input logab as log (a, b). Base 10 is the initial default setting if you do not input anything for a.

Example 1: log101000 = log 1000 = 3

• (log)1000
• 

Example 2: log216 = 4

• (log)2(,)16
• 

The key (or – [Func Analysis] > [Logarithm(logab)]) also can be used for input, but only while MathI/MathO or MathI/DecimalO is selected for Input/Output on the SETTINGS menu. In this case, you must input a value for the base.

Example 3: log216 = 4

• 216
• 

Use (ln) or – [Func Analysis] > [Natural Logarithm] to input "ln".

Example: ln 90 (= loge90) = 4.49980967

• (ln)90
•