1.

If f(x)=a+bx+cx^(2)where cgt0 and b^(2)-4aclt0 then the area enclosed by the co-ordinate axes, the line x=2, and the curve y=f(x) is given by

Answer»

`(1)/(3){4f(1)+f(2)}`
`(1)/(2){f(0)+4f(1)}`
`(1)/(2){f(0)+4f(1)+f(2)}`
`(1)/(3){f(0)+4f(1)+f(2)}`

Solution :Area`=underset(0)overset(2)(int)ydx=underset(0)overset(20)(int)(a+bx+cx^(2))dx=2a +2B+(8C)/(3)`
`=(1)/(3)(6a+6b+8c)`
`=(1)/(3){f(0)+4f(1)+f(2)}`


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