" If "(a-1)^(2)+(b+2)^(2)+(c+1)^(2)=0" then the value of "2a-3b+7c" is "

If (a-1)^(2)+(b+2)^(2)+(c+1)^(2)=0 then 2a-3b+7c is

If (3a+1)^(2) +(b-1)^(2) +(2c-3)^(2)=0 , then value of (3a+b+2c) is

If a^((1)/(2))+b^((1)/(2))-c^((1)/(2))=0 then the value of (a+b-c)^(2) is dots

Suppose a,b,c, gt0 and |(a^(3)-1,a^(2),a),(b^(3)-1,b^(2),b),(c^(3)-1,c^(2),c)|=0 then least possible value of a+b+c is ____________