If x is real, the minimum value of f(x) = x^2 - 8x + 20 is : Option 1: 4 Option 2: 1 Option 3: 2 Option 4: 3

The answer is '4'. View full solution:

CUET Mathematics - If x is real, the minimum value of f(x) = x^2 - 8x + 20 is : | PYQs + Solutions

7 June Shift 1

Any function f(x) is an increasing function in [a,b] if :

(A) $x_1, x_2 \in [a, b], f(x_1) \geq f(x_2)$ if $x_1 < x_2$

(B) $x_1, x_2 \in [a, b], f(x_1) \geq f(x_2)$ if $x_1 > x_2$

(C) (A) $x_1, x_2 \in [a, b], f(x_1) \leq f(x_2)$ if $x_1 < x_2$

(D) (A) $x_1, x_2 \in [a, b], f(x_1) < f(x_2)$ if $x_1 > x_2$

11 Aug Shift 1

If $x = 2at, y = at^2$ , where 'a' is a constant, then $\frac{d^2 y}{dx^2}$ at $x = 2$ is :

30 May Shift 3

The demand function of a monopolist is given by $p = 1500 - 2x - x^2$ , then value of marginal revenue when $x = 20$ is :