Compute the rank of A=[aij]2021X2021 where aij =1 if i=j (PO1)=0 if i≠j=0 if i≠j
2×-3y less than1
x+1/x=113/56
25*2-42/6+18
Check whether the function xy ^ 2 is the real part of an analytic function.
x*y*z=72
x*y=32
x=?
xy + ysquare = 1 find y''
3-4=1