Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) If `|[(1+x),(1+x)^2,(1+x)^3],[(1+x)^4,(1+x)^5,(1+x)^6],[(1+x)^7,(1+x)^8,(1+x)^9]|=a_0+a_1x+a_2x^2+........`, then `a_1` is equal to - Sarthaks eConnect

If `|[(1+x),(1+x)^2,(1+x)^3],[(1+x)^4,(1+x)^5,(1+x)^6],[(1+x)^7,(1+x)^8,(1+x)^9]|=a_0+a_1x+a_2x^2+........`, then `a_1` is equal to:

none of these