Which term in the expansion of (2−3x)19 has algebraically the least coefficient?

For algebraically the least coefficient, we first find the numerically the greatest term for x = 1.Using r≤n+11+abx, we getr≤19+11+23⇒r≤12Therefore T13 and T12 have numerically the greatest coefficients.T12 is algebraically the least as it is followed by negative sign.