`If 3(x-5)-5(x-2)=0 ` value of x`= (A) 2/5 (B) 5/2 (C) -5/2 (D) 0`

If 1/2+1/x=2, then x= (a) 2/5 (b) 5/2 (c) 3/2 (d) 2/3

The function f(x)=sum_(r=1)^5(x-r)^2 assuming minimum value at x= (a) 5 (b) 5/2 (c) 3 (d) 2

The function f(x)=sum_(r=1)^5(x-r)^2 assuming minimum value at x= (a) 5 (b) 5/2 (c) 3 (d) 2

If x^2+x+1 is a factor of the polynomial 3x^3+8x^2+8x+3+5k , then the value of k is (a) 0 (b) 2/5 (c) 5/2 (d) -1

If (3^(2x-8))/(225)=(5^3)/(5^x) , then x= (a) 2 (b) 3 (c) 5 (d) 4

The function f(x)=sum_(k=1)^5 (x-K)^2 assumes then minimum value of x given by (a) 5 (b) 5/2 (c) 3 (d) 2

If the function f(x)=((128 a+a x)^(1/8)-2)/((32+b x)^(1/5)-2) is continuous at x=0 , then the value of a/b is (A) 3/5f(0) (B) 2^(8/5)f(0) (C) (64)/5f(0) (D) none of these

The minimum value of |x-3|+|x-2|+|x-5| is (A) 3 (B) 7 (C) 5 (D) 9

If theta is the angel between the planes 2x-y+z-1=0 and x-2y+z+2=0 then costheta= (A) 2/3 (B) 3/4 (C) 4/5 (D) 5/6

if 9^(x+2)=240+9^x , then x= (a) 0. 5 (b) 0.2 (c) 0.4 (d) 0.1