MathCastle
Linear AlgebraSuperchallengeDeterminants & Inverses

Determinants & Inverses · Superchallenge problem

Let AA be the 5×55\times5 matrix with entries aij=(i+ji)a_{ij} = \dbinom{i+j}{i} for 0≤i,j≤40 \le i, j \le 4 (so its first row is 1,1,1,1,11,1,1,1,1 and its second row is 1,2,3,4,51,2,3,4,5). Compute det⁡A\det A.