Viết phương trình mặt phẳng tiếp xúc với mặt x 2
2
+ y
2
4 − z
2 = 1 tại điểm M ( 2,−2,1).

the correct answer is a.) bc< mn 5 stars if this you : )

step-by-step explanation:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.