If 3x - 14 = 4 then x =

If 5^x = 1/3, then 5^−7x = ?

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

If x + (1/x) = 3, then the value of x³ + (1/x³) is :

If 1² = 1, 11² = 121, then 111² = ?

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