PART 3: Integrals, derivatives, sums and products
Part 3: integrals, derivatives, sums and products. These four functions are teal labels, so each one starts with ALPHA, and each uses the variable x.
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Integral and derivative
Example 10: integrals and derivatives. The integral is ALPHA and the ( key. The derivative is ALPHA and the ) key. The variable x is ALPHA and the RCL key. They all work in NORMAL mode.
The Σ function
Example 11: the sum function. Sigma is ALPHA and the × key. It adds up an expression, from a first value of x to a last one.
The Π function
Example 12: the product function. It is ALPHA and the ÷ key, and it multiplies an expression from a first value of x to a last one.
