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HCU MCA 2013 Paper
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© examsnet.com
Question : 50
Total: 75
The area of the polygon whose vertices are (x, x), (x + 1, x + 1) and (x, x+ 2) is equal to
x
2
12
1
2x
2
Validate
Solution:
(d) Area of the required polygon with vertices (x, x), (x +1, x +1) and (x, x + 2) is
=
1
2
|
x
x
1
x
+
1
x
+
1
1
x
x
+
2
1
|
Using operation
R
1
→
R
2
−
R
1
,
R
3
→
R
3
−
R
1
=
1
2
|
x
x
1
1
1
0
0
2
0
|
Expanding along
C
3
= 1{ 2 - 0 } =2.
© examsnet.com
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