The constant term in the expansion of [3x+1&2x-1&x+2 5x-1&3x+2&x+1 7x-2&3x+1&4x-1] is

Question

The constant term in the expansion of [3x+1&2x-1&x+2 5x-1&3x+2&x+1 7x-2&3x+1&4x-1] is (A) - 10 (B) 0 (C) 6 (D) 2

Tardigrade Admin · Accepted Answer

Take x=0 | beginmatrix1&-1&2 -1&2&1 -2&1&-1 endmatrix|=1(-3)+1(3)+2(3)=6

Q. The constant term in the expansion of $⎣ ⎡ 3 x + 1 5 x - 1 7 x - 2 2 x - 1 3 x + 2 3 x + 1 x + 2 x + 1 4 x - 1 ⎦ ⎤$ is