12th Class
Mathematics
Sample Paper
Mathematics Olympiad - Sample Paper-5
question_answer
The value of \[(x+y)(x-y)+\frac{1}{2!}(x+y)(x-y)\]\[({{x}^{2}}+{{y}^{2}})+\frac{1}{3!}(x+y)(x-y)({{x}^{4}}+{{y}^{4}}+{{x}^{2}}{{y}^{2}})+......+\] \[\infty \]is___________.