Question

if a,b,c,d are in continued proportion prove that:-
(a+b)(b+c)-(a+c)(b+d)=(b-c)²
please ans this question fast....​

Answer 1

Answer:

if a,b,c,d are in continued proportion prove that:-

(a+b)(b+c)-(a+c)(b+d)=(b-c)²

please ans this question fast....