Madhyamik Question Paper Solution of Year 2015 Question No: 10.(a)
যদি \(x={{\sqrt7}+{\sqrt3}\over {\sqrt7}-{\sqrt3}}\) এবং xy=1 হয়, তবে দেখাও যে,\({x^2+xy+y^2\over x^2-xy+y^2}={12\over 11}\)
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