C-03-Q100mediumsingle_mcqIf a−1a=1a - \dfrac{1}{a} = 1a−a1=1, a3−1a3=?a^3 - \dfrac{1}{a^3} = ?a3−a31=?a444b111c−1-1−1dব্যাখ্যাUsing a3−1a3=(a−1a)3+3(a−1a)=13+3(1)=4a^3-\dfrac1{a^3}=\left(a-\dfrac1a\right)^3+3\left(a-\dfrac1a\right)=1^3+3(1)=4a3−a.