1.

The function `x^(5)-5x^(4)+ 5x^(3) -10` has a maxima, when `x=`A. 3B. 2C. 1D. 0

Answer» Correct Answer - C
`(dy)/(dx)=(d)/(dx)(x_(5)-5x_(4)+5x_(3)-10)`
`= 5x_(4)-20x_(3)+15x_(2)=0`,
`(d^(2)y)/(dx^(2)) lt 0`
at `x =1`.


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