Question 78

The point R(a,b) is first reflected in origin to R1 and R1 is reflected in xaxis to (4,2). The coordinates of point R are

Solution

R(a,b) after reflection at the origin = (-a,-b)

Reflection of point (-a,-b) in the x-axis is (-a,b)

According to ques,

=> $$(-a,b) = (4,2)$$

=> $$a = -4$$ and $$b = 2$$

$$\therefore$$ Coordinates of Point R = (-4,2)

=> Ans - (C)

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The point R(a,b) is first reflected in origin to R1 and R1 is reflected in x­axis to (­4,2). The co­ordinates of point R are