Which of the following are subspaces of r[infinity]? if not, explain why. a) all sequences such that |xj+1| ≥ |xj | for each j. b) all convergent sequences: the xj has a limit as j → [infinity]. c) all arithmetic progressions: xj+1 − xj is the same for all j. d) all geometric progressions: (x1, k x1, k2 x1, . .) allowing all k and x1

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

is only a line? i think so

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72