The differential equation dy dx equals the quotient of the quantity y minus 2 and y plus 1

produces a slope field with horizontal tangents at y = 2

produces a slope field with vertical tangents at y = −1

produces a slope field with columns of parallel segments,

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236