Question

Write a function file that accepts the values of r, a and n as arguments and uses a for loop to return the sum of the first n terms of the geometric series. test your function for a = 3, r = 1/2 and n = 10.

Answer 1

Given, a = 3, r = 1/2, n = 10

%r is common ratio

%n is number of terms

%a is the first term of the series

Sum = 0;

a = 3;

r = 1/2;

for i = 0 : 1 :  10;

Sum = Sum + a * r ^ i;

end

Sum