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Question

The area bounded by the line y=|x−2|,|x|=3 and y=0 is

A
13 unit2
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B
5 unit2
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C
9 unit2
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D
7 unit2
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Solution

The correct option is A 13 unit2
The graph of y=x cuts the x axis at x=2.
For x<2
y=2x
Hence area between -3 to 2 will be
=23(2x).dx
=5×52 ...(area of right angled triangle with coordinates (2,0),(-3,0)(-3,5)).
=252 ...(i)
And area bounded by f(x) between 2 and 3
=32x2.dx
=1×12 ...(area of right angled triangle with coordinates (2,0),(3,0)(3,1)).
=12 ...(ii)
Hence the total area bounded by the curve between -3 and 3 is equal to
=i+ii
=252+12
=13 sq units.

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