N
nd_chaungoanbacho


cho n dien tro,moi dien tro co cac gia tri R1,R2........Rn.hoi co bao nhieu gia tri Rtd khi mac cac dien tro.biet cac bieu thuc duoc thanh lap tu co so khac nhau co gia tri khac nhau
| bai to hop_xac suat kho qua.ai lam duoc xin cam on vo cung tan,cam on nhieu nhieu.