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Question

Question: Area bounded by y = –x<sup>2</sup> + 6x – 5, y = –x<sup>2</sup> + 4x –3 and y = 3x – 15, for x \> 1...

Area bounded by y = –x2 + 6x – 5, y = –x2 + 4x –3 and

y = 3x – 15, for x > 1, is (in sq. units)

A

73

B

13/6

C

73/6

D

None of these

Answer

73/6

Explanation

Solution

(

A =14{(x2+6x5)(x2+4x3)}dx\int _ { 1 } ^ { 4 } \left\{ \left( - x ^ { 2 } + 6 x - 5 \right) - \left( - x ^ { 2 } + 4 x - 3 \right) \right\} d x +

45{(x2+6x5)(3x15)}dx\int _ { 4 } ^ { 5 } \left\{ \left( - x ^ { 2 } + 6 x - 5 \right) - ( - 3 x - 15 ) \right\} d xA = 736\frac { 73 } { 6 }