Question

a. A = {2, 4, 6, ..., 50}​

Answer 1

Answer:

A = {2, 4, 6, ..........., 50}

A = {x | x belongs to I+, x is an even integer}

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This is the Set Builder form of the given Roster set.

:)

Answer 2

The given set in roster form can be written as:

A = { x| x = 2n; 1≤n≤25; n € I}