Browse · harp Print → smc prealgebra intermediate Problem In the sequence ...,a,b,c,d,0,1,1,2,3,5,8,... each term is the sum of the two terms to its left. Find a. (A) −3 (B) −1 (C) 0 (D) 1 Solution — click to reveal We work backwards to find a. d+0=1⟹d=1 c+1=0⟹c=−1 b+(−1)=1⟹b=2 a+2=−1⟹a=−3 Final answer A ← Previous problem Next problem →