What does remedial mean

In he example code, what does the title attribute create? a tool tip an element a source a markup

In simple terms, how would you define a protocol?

Use a while-end loop in a script file to calculate the sum of the first n terms of the series: summation sign on the top n bottom k=1 : )^k * k^2 +5k)/3^k show the script file and the two results of n = 10 and n = 20.