C-11-Q075mediumsingle_mcqa3+b3a3−b3=c3+d3c3−d3\dfrac{a^3+b^3}{a^3-b^3}=\dfrac{c^3+d^3}{c^3-d^3}a3−b3a3+b3=c3−d3c3+d3 থেকে —aa:b=c:da:b = c:da:b=c:dba+b=c+da+b = c+da+b