The blue circle has radius 2 and the green circle has radius 1 AB is a common tangent and all 3 circles touch each other. Find the radius of the smallest circle. The answer is btw 6 - 4√2 how ever I'm only getting as to far as (6-2√2)/7 Please solve with working

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.