Suppose u={3,5,6,9,10,13,14,17,19} is the universal set and a={6,10,17}. what is a?

subset

Step-by-step explanation:

A is a subset of u, because all the members of a belong to u

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2