Gwhich of the following are second-order linear homogeneous recurrence relations with constant coefficients? circle all that apply and explain each answer. a. a_k=2a_(k-1)-5a_(k-2) b. b_k=kb_(k-1)+b_(k-2) c. c_k=c_(k-1)⋅c_(k-2)^2 d. d_k=3d_(k-1)-πd_(k-2) e. r_k=r_(k-1)-r_(k-2)-2 f. s_k=100s_(k-2) g. u_k=2u_(k-1)

+15-35=-20

going in opposite directions

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.

if i write it on a piece of paper and submit it to you would that be okay

explanation: