Which is the equation of an ellipse centered at the origin with foci on y-axis, x-intercepts +-1 and y-intercepts +-8? a. x^2/2+y^2/64=1 c. x^2/64+y^2/1=1 b. x^2/1+y^2/64=1 d. x^2+y^2/8=1 Please select the best answer from the choices provided A B C D

Asequence has its first term equal to 4, and each term of the sequence is obtained by adding 2 to the previous term. if f(n) represents the nth term of the sequence, which of the following recursive functions best defines this sequence? (1 point) f(1) = 2 and f(n) = f(n − 1) + 4; n > 1 f(1) = 4 and f(n) = f(n − 1) + 2n; n > 1 f(1) = 2 and f(n) = f(n − 1) + 4n; n > 1 f(1) = 4 and f(n) = f(n − 1) + 2; n > 1 i will award !