The value of √(0.36/0.30) is approximately equal to

If x + (1/y) = 1 and y + (1/z) = 1, then the value of z + (1/x) is

The value of × satisfying the equations 1/x + 1/y = 8, 1/y+1/z = 12, 1/z +1/x = 10 is

If 2^(x−1) + 2^(x+1) = 1280, then the value of x²+9x is

If x² + 1/x² = 51, then (x − 1/x) is equal to

If the product of the roots of the equation 3kx^2 - 25kx + k + 8 = 0 is 3, then k is