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Question

Question: The area between the curve \(y = 4 + 3 x - x ^ { 2 }\) and x-axis is...

The area between the curve y=4+3xx2y = 4 + 3 x - x ^ { 2 } and x-axis is

A

125/6

B

125/3

C

125/2

D

None of these

Answer

125/6

Explanation

Solution

Solving y=0y = 0 and y=4+3xx2y = 4 + 3 x - x ^ { 2 }we getx=1,4x = - 1,4. Curve does not intersect x-axis between x=1x = - 1and x=4x = 4.

∴ Area=14(4+3xx2)dx=1256= \int _ { - 1 } ^ { 4 } \left( 4 + 3 x - x ^ { 2 } \right) d x = \frac { 125 } { 6 }