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Area bounded by f(x)=(x-1)(x+1)/(x-2), the x-axis and the ordinates x=0 and x=1.5 is
(a) 4/5 sq unit
(b)7/8 sq unit
(c) 1 sq unit
(d) none of these
The curve has roots at x= -1 and +1 and x=2 is asymptote of f(x)
so, 0<x<1, f(x) is positive
1<x<1.2, f(x) is negative
f(x) can be simplified to: f(x) = (x+2) + 3/(x-2)
area bounded is : limits (0,1) f(x) - limits (1,1.5) f(x)
Area = { integrating from (0,1) on:(x+2) + 3/(x-2) } - { integrating from (1,1.5) on:(x+2) + 3/(x-2) }
= x2/2 +2x +3.ln(x-2) |on (0,1) - x2/2 +2x +3.ln(x-2) |on (1,1.5)
= 2 - (9/8)
= 7/8 sq. units
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regards
Ramesh
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