" 29."f(x)=x^(8)+6x^(2)

Determine the intervals in which the following functions are strictly increasing or strictly decreasing : f(x)=x^(8)+6x^(2) .

Find the intervals in which f(x)=x^(8)+6x^(2) is increasing or decreasing.

Let f(x)=8x^(3)-6x^(2)-2x+1, then

Let f(x)=8x^(3)-6x^(2)-2x+1, then

Let f(x)=8x^(3)-6x^(2)-2x+1, then

Find all the points of local maxima and minima of the f(x)=x^(3)-6x^(2)+9x-8

Let f(x)=x^(8)-6x^(7)+5x^(6)+x^(4)-5x^(3)-x^(2)-3x+3AA x in R then f(5) is equal to :-