wolframalpha

how to calculate summation of a polynomial up to say n = 10 in WolframAlpha

I want to calculate the following summation up to n=10. Figure 1

I know one way is to get the simplified expression but in many cases they may not be available. Is there another way to do it in wolframalpha?

Figure 2

I tried to use

n=4; before the summation

Solution

  • Is this what you are looking for?

    Sum[k!,{k,2,4}]

    which instantly returns 32

    or

    Sum[k!,{k,2,10}]

    which instantly returns 4037912

    WolframAlpha isn't really a "programming language" where you give it a sequence of statements and expect it to do those one step at a time and assign values to variables and later use those variables to remember the values assigned to calculate results. Instead you give WolframAlpha a single expression and it displays the result of evaluating that single expression.