If the equations kx-2y=3 and 3x y=5 represent two intersecting lines a...
Solution:
Understanding the Problem:
We are given two equations kx-2y=3 and 3x y=5. We need to find the value of k such that the two equations represent two intersecting lines at a unique point.
Method:
We can find the value of k by solving the two equations simultaneously and checking whether the lines intersect at a unique point. If the lines intersect at a unique point, then the value of k is the solution of the problem.
Solving the Equations:
Let's solve the given equations to find the value of k.
kx-2y=3
3x y=5
Multiplying the second equation by 2, we get:
6xy=10
Now, we can substitute y from the second equation in the first equation and get:
kx-2(5/3x)=3
Simplifying the equation, we get:
kx-10/3x=3
Multiplying the equation by 3, we get:
3kx-10x=9
Bringing all the terms to one side, we get:
3kx-10x-9=0
This is a quadratic equation in x. We can solve this equation using the quadratic formula.
The quadratic formula is:
x = [-b ± sqrt(b^2 - 4ac)]/2a
In our equation, a = 3k, b = -10, and c = -9. Substituting the values in the formula, we get:
x = [10 ± sqrt(100 + 108k)]/6k
Since the lines intersect at a unique point, the quadratic equation has only one root. This means that the discriminant of the quadratic equation is zero.
The discriminant is:
b^2 - 4ac = 100 + 108k
Setting the discriminant to zero, we get:
100 + 108k = 0
Solving for k, we get:
k = -25/27
Conclusion:
Therefore, the value of k is -25/27.
If the equations kx-2y=3 and 3x y=5 represent two intersecting lines a...
K=-6
As the points are intersecting so a1/a2=b1/b2
Therefore, k/3=-2/1
So, our answer is -6
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