MathematicsEasy64×since 2002Q3013If A denotes the sum of all the coefficients in the expansion of (1−3x+10x2)n\left(1-3 x+10 x^2\right)^{\mathrm{n}}(1−3x+10x2)n and B denotes the sum of all the coefficients in the expansion of (1+x2)n\left(1+x^2\right)^n(1+x2)n, then :AB=A3\mathrm{B}=\mathrm{A}^3B=A3B3A=B3 \mathrm{A}=\mathrm{B}3A=BCA=3BA=3 BA=3BDA=B3\mathrm{A}=\mathrm{B}^3A=B3Check answerSkip