4. (a) A geometric series has first term ‘a’ and the common ratio is 2^-1/2. Show that the sum to infinity of the geometric progression is a(2+ √2)
REFER TO THE PICTURE ABOVE

4 a A geometric series has first term a and the common ratio is 212 Show that the sum to infinity of the geometric progression is a2 2 REFER TO THE PICTURE ABOV class=