Find maximum and minimum value :`y=5x^(3)+2x^(2)-3x`

If 'x' be real, find the maximum and minimum value of : y=(x+2)/(2x^(2)+3x+6)

Find the maximum and minimum values of f(x)=2x^3+5 on R , if any, without using derivatives.

Find the maximum and minimum values of f(x)=2x^3-24 x+107 in the interval [1,\ 3] .

If the maximum and minimum values of y=(x^2-3x+c)/(x^2+3x+c) are 7 and 1/7 respectively then the value of c is equal to (A) 3 (B) 4 (C) 5 (D) 6

Find the maximum and minimum value of y = asin^2x + b sinx.cosx + c cos^2x

Find maximum and minimum values of 9cos^(2)x + 48 sinx cosx - 5 sin^(2)x - 2 .

If the function y=f(x) is represented as x=phi(t)=t^5-5t^3-20 t+7 , y=psi(t)=4t^3-3t^2-18 t+3(|t|<2), then find the maximum and minimum values of y=f(x)dot

Find the maximum and the minimum values of f(x)=3x^2+6x+8,\ \ x in R , if any.

Find both the maximum and the minimum value of 3x^4-8x^3+ 12 x^2-48 x+1 on the interval [1,4] .

Find both the maximum and the minimum value of 3x^4-8x^3+ 12 x^2-48 x+1 on the interval [1,4] .