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Statement-1 : The locus of complex numb...

Statement-1 : The locus of complex number z, satisfying `(z-2)^(n) =z^(n)` is a straight line .
and
Statement -2 : The equation of the form ax + by+c =0 in x -y plane is the general equation of striaght line.

A

Statement -1 is True, Statement -2 is True, Statement -2 is a correct explanation for statement -9

B

Statement -1 is True, Statement -2 is True , Statement -2 is NOT a correct explanation for Statement -9

C

Statement -1 is True, Statement -2 is False

D

Statement -1 is Flase, Statement -2 is True

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given problem, we need to analyze both statements regarding complex numbers and straight lines. ### Step 1: Analyze Statement 1 The first statement is: \[ (z - 2)^n = z^n \] ### Step 2: Rewrite the Equation We can rewrite this equation as: \[ \frac{(z - 2)^n}{z^n} = 1 \] ### Step 3: Take Modulus of Both Sides Taking the modulus of both sides gives us: \[ \left| \frac{(z - 2)^n}{z^n} \right| = |1| \] Since the modulus of 1 is 1, we have: \[ \left| (z - 2)^n \right| = |z^n| \] ### Step 4: Simplify the Modulus Using the property of moduli, we can simplify this to: \[ |z - 2|^n = |z|^n \] ### Step 5: Cancel the Exponent Since \(n\) is a positive integer, we can cancel \(n\) from both sides: \[ |z - 2| = |z| \] ### Step 6: Interpret the Result The equation \( |z - 2| = |z| \) means that the distance from the point \(z\) to the point \(2\) (on the real axis) is equal to the distance from \(z\) to the origin (0). This describes a perpendicular bisector of the line segment joining the points \(0\) and \(2\) in the complex plane. ### Step 7: Identify the Locus The locus of points \(z\) satisfying this condition is indeed a straight line, specifically the vertical line \(x = 1\) in the Argand plane. ### Conclusion for Statement 1 Thus, Statement 1 is **true**. ### Step 8: Analyze Statement 2 The second statement is: "The equation of the form \(ax + by + c = 0\) in the \(xy\) plane is the general equation of a straight line." This is a well-known fact in coordinate geometry. ### Conclusion for Statement 2 Thus, Statement 2 is also **true**. ### Final Conclusion Since both statements are true, we conclude that Statement 1 is true, and Statement 2 provides a correct explanation for Statement 1.
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AAKASH INSTITUTE ENGLISH-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-Assertion -Reason Type Questions
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