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Question

The minimum and maximum value of y=x2x+4x2+x+4 will be and respectively.

A
35
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B
53
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C
52
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D
25
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Solution

The correct option is B 53
y=x2x+4x2+x+4(y1)x2+(y+1)x+4y4(y+1)216(y1)20(53y)(5y3)0(3y5)(5y3)0y(35,53]

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