Z(in) of circuit help?? 1. The problem statement, all variables and given/known data A. 10+j2.5 (Ω) B. 10-j0.4 (Ω) C. 10-j2.5 (Ω) D. 10+j0.4 (Ω) 2. Relevant equations Z(L)=jwl Z(C)=-j/wc 3. The attempt at a solution the problem asks for z(in) without any frequency w given? i think i was just confused by the wording of this problem. s=sigma+jw so does that mean, j2 given means w=2?? then answer would be 10+j2.5 (A). but i'm unsure how to do this without any w.