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

If ω (ω ≠ 1) be a cube root of unity and (ω + 1)^8 = a + bω, then a.b equals

If 2^(2x−1) + 4^x = 2^(x−1/2) + 2^(x+1/2), then the ratio (1−x)/(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

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