Straight AX 2 1 0 and straight line 6 x 4Y C 0 in parallel, then

Landlord, you may have copied the wrong question, it is estimated that the straight line ax-2y-1=0 and the straight line 6x-4y+c=0 are parallel, then ( )

Solution: The condition that L1 is parallel to L2 is: K1=K2 and B1 is not equal to B2, let L1:AX-2-1=0, L2:6X-4Y+C=0

That is, a1b2-a2b1=0, and b1c2-c1b2 is not equal to =0, so substitution gives a1=a=3, and c is not equal to -2

It should be ax-2y-1=0 choose b

ax(-4)-6x(-2)=0 Note: This is the formula for finding two straight lines parallel, which you should have in your math book.

a=3 and because the two lines are parallel and do not coincide, c is not equal to (-2) Note: If the two lines are parallel and do not coincide.

a 6 = (-2) (-4) is not equal to (-1) c, so c is not equal to -2

Landlord, I think you should have copied the wrong question. If my analysis is correct, the problem should look like this: the straight line ax-2y-1=0 and the straight line 6x-4y+c=0 are parallel, then ( ).

c = -2 and c is not equal to -2

Not equal to -3, c=-2 not equal to -3, c not equal to -2 solution: two straight lines are parallel.

a/6=-2/-4=1/2

a=3 and two straight lines cannot coincide.

C≠-2 is therefore B

Then a -2 = 6 -4 a is not right, c = -2 coincides, b is not right c and d is not right a = 3 give a.

If parallel, then the slopes must be equal.

i.e. a:4=3:-1

Then a=-12

Summary. If the straight line 4x-2y-7=0 is parallel to ax-y-9=0, then the value of a is the solution, because the slope of the straight line 4x-2y-7=0 k=2, the slope of the straight line ax-y-9=0 k1=a, and because the two straight lines are parallel, k=k1 is both 2=a, so the value of a is 2

If the straight line 4x-2y-7=0 is parallel to ax-y-9=0, then the value of a is .

Hello to you, I am the co-teacher of the question, Mr. Xiao Kai Potato Gao, who is good at junior high school and college education, and has been engaged in the education industry for 10 years, and I am very happy to serve you. Please wait patiently, about 5 minutes.

The value of a is 2, if the straight line 4x-2y-7=0 is parallel to ax-y-9=0, then the value of a is the solution, because the slope of the straight line 4x-2y-7=0 k=2 is the slope of the straight line ax-y-9=0 k1=a, and because the two straight lines are parallel to each other, so k=k1 is 2=a, so the value of a is 2

If the straight line 4x-2y-7=0 is parallel to ax-y-9=0, then the value of a is the solution, because the slope of the straight stupid line 4x-2y-7=0 k=2, the slope of the straight line ax-y-9=0, k1=a, and because the two straight lines are parallel to each other, k=k1 is 2=a, so the value of a is 2

Because the straight line ax+6y-1=, y=-ax takes spring 6+1 a, and the straight line x-2y+1=0, i.e., y=x 2+1 2. Because they are perpendicular defibrillation resistant, the slope multiplied equals -1, so -a 6 1 2 = -1, and the solution gives a = 12. Dong Hong.

When two straight lines are perpendicular to the Qing feast, the product of the slope of its silver = -1

2 Feast (3)*(3) (a)=-1a=2

Because the two straight lines are parallel, the oblique jujube rate is the same, so it is known that the straight line y=2x 3+8 3, and y=-ax 6+7 6. Therefore, there is -a 6 = 2 3, and the wide roll of the bush is a = -4

Because the straight line 2x-3y-10=0 and ax 10-6y-7=0 call the front in parallel, so 2 a = a 3 6

A 3a = 12

a = a chain of 4.

Solution: The family plexus limb (1) is obtained from 1: y=-a 2x+3 is obtained from 2

y=1 Zheng Xiao15x-1 3 When k (that is, the slope) = 1 15, the equation has no solution So: -a 2=1 15 a=-2 15 So: when a is not equal to -2 15 things, the system of equations has a unique solution (2) in.

Yes!Because 2x + 3y -1=0 is multiplied by 2 at the same time to get the equation 4x + 6y -2=0

As long as ax + by +d =0 , ax + by +d =0a * b = a * b can identify these two straight lines.

Parallel limb oak. In the noisy fingers, a b d and a b d both denote a constant, such as , -79,10000..

Your question is 2 * 6 = 3 * 4 = 12

The slope of the straight line 2x+3y+5=0 is -2 3, and the straight line (a-2)x+ay-1=0 is parallel to the straight wax silver line 2x+3y+5=0, then the straight line (a-2)x+ay-1=0 slope k=-(a-2) a=-2 3, so the wheel guesses the banquet Zhaopi=3(a-2)=2a, a=6

The slope of the straight line 3x+4y-11=0 balances the wisdom k1=-3 4, the slope of the straight line ax-2y+7=0 k2=a 2, if the two straight lines are perpendicular, then the slope product is -1, so, the squire family a=8 3.

The straight line is perpendicular and the slope is negative reciprocal.

3/4 = 2/a

a = 8/3

3a－8＝0

A 8 3 when two straight lines are perpendicular to each other.