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)

fghbdt gjdtyg thd tghbtrg htd

step-by-step explanation:

y htf dfh drthf hdt hdthyty hty

c. rb

explanation:

the atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s