How to write this summation series?

S=2*r^3 + 4*r^5 + 6*r^7+ 8*r^9 + ... + (2n)*r^(2n+1). Display the sum in the main script with 3 decimal places.

[the cyclist]

Sounds like homework. Show us what you've tried, tell us where you're stuck, and you'll probably get some help.

Answer 1

[Yash Ubale]

Here is the sample code which you can use to find the summation of the above series by appropriately setting the values of 'n' and 'r'.

It is highly encouraged to first try out on your own and then ask for the solution or code.

r = 1.1;
n = 10;
sum = 0;

for i = 1 : n 
    sum = sum + 2*i*r^(2*i+1);
end

fprintf('Sum is : %.3f\n',sum);