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Q.

A rectangle ABCD, where A≡(0,0),B≡(4,0), C≡(4,2),D≡(0,2), undergoes the following transformations  successively:  i. f1(x,y)→(y,x) ii. f2(x,y)→(x+3y,y) iii. f3(x,y)→((x−y)/2,(x+y)/2)The final figure will be

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a

a square

b

a rhombus

c

a rectangle

d

a parallelogram

answer is D.

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Detailed Solution

Clearly, A will remain as (0,0);f1 will make B as (0,4),f2 will make it (12,4) , and f3 will make it (4,8);f1 will  make C as (2,4),f2 will make it (14,4) , and f3 will make it (5,9) . Finally, f1 will make D as (2,0),f2 will make it (2,0) , and f3 will make it (1,1) . So, we finally get A≡(0,0),B≡(4,8),C≡(5,9) , and D≡(1,1) . Hence, mAB=84,mBC=9−85−4=1,mCD=9−15−1=84,mAD=1,mAC=95,mBD=8−14−1=73Hence, the final figure will be a parallelogram.
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A rectangle ABCD, where A≡(0,0),B≡(4,0), C≡(4,2),D≡(0,2), undergoes the following transformations  successively:  i. f1(x,y)→(y,x) ii. f2(x,y)→(x+3y,y) iii. f3(x,y)→((x−y)/2,(x+y)/2)The final figure will be