If 5^x = 1/3, then 5^−7x = ?
If 3x - 14 = 4 then x =
If x² + 1/x² = 51, then (x − 1/x) is equal to
If x + (1/x) = 3, then the value of x³ + (1/x³) is :
If 2^(2x−1) + 4^x = 2^(x−1/2) + 2^(x+1/2), then the ratio (1−x)/(1+x) is
