Which of the following are geometric sequences (check all that apply)A.) 1, 1, 2, 3, 5, 8, 13B.) 10,5, 2.5, 1.25, 0.625, 0.3125C.) -9, -3, -1, -1/3, -1/9, -1/27D.) 5, 10, 15, 20, 25

Answer:B and C are geometric sequences.Step-by-step explanation:A geometric sequence is a sequence of numbers in which the ratio between consecutive terms is constant.A is not a geometric sequence because the number 1 is repeated twice in the sequence.B is a sequence because the sequence is being multiplied by 0.5 each time. C is a geometric sequence because it is being multiplied by 1/3 each time.D is not a geometric sequence because it is not being multiplied each time - it is increasing by +5 (arithmetic progression - not geometric).Hope this helps!