Question

12. Sum of the series (x - y)2 + x² + y2 + (x + y)2 + ... + [(x + y)² + 6xy) is
1) 2(x++y?+3xy) 2) 3(x++y2+3xy) 3) 6(x++y2 +3xy)
4) 4(x++y+3xy)​

Answer 1

Answer:

option B is answer....