C-04-Q098mediumsingle_mcqan+1+anan+1−an=?\dfrac{a^{n+1} + a^n}{a^{n+1} - a^n} = ?an+1−anan+1+an=?aa+1a−1\dfrac{a+1}{a-1}a−1a+1ba−1a+1\dfrac{a-1}{a+1}a+1a−1caaad111ব্যাখ্যাFactor ana^nan from top and bottom: an(a+1)an(a−1)=a+1a−1\dfrac{a^n(a+1)}{a^n(a-1)}=\dfrac{a+1}{a-1}an(a−1)an(a+1)=a−1a+1.