I need help with this problem with details please. 3=1×3 3+9=2×6 (3+6=9 ; 2x(3×2)) 3+9+15=3×9 (9+6=15 ; 3x(3×3)) 3+9+15+21=4×12 (15+6=21 ; 4x(3×4)) The series is best described by B that is left hand side equals the right hand side Request A Fresh Paper Done For You!You are guaranteed plagiarism free paper within 3-8 hrs About the author classhelp24@gmail.com [email if you need fresh paper done]