Question

J = { x : x = 1 /n n e N,4< n<10}
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Answer 1

Step-by-step explanation:

J = { x : x = 1 /n n e N,4< n<10}

{5,6,7,8,9}

Answer 2

Answer:

$\sf\pink{Answer}$

Step-by-step explanation:

Answer: S = {(x1,x2)T |x1x2 = 0} No, this is not a subspace. Every element of S has at least one component equal to 0. The set is closed under scalar multiplication, but not under addition.