Find the value (s) of `r` satisfying the equation `"^69 C_(3r-1)-^(69)C_(r^2)=^(69)C_(r^2-1)-^(69)C_(3r)dot`

Number of values of r satisfying the equation ""^(69)C_(3r-1)- ""^(69)C_(r^(2)) = ""^(69)C_(r^(2)-1) - ""^(69)C_(3r) is

The number of values of r satisfying the equation ""^(39)C_(3r-1) -""^(39)C_(r^2) = ""^(39)C_(r^2-1) -""^(39)C_(3r) is

The number of values of 'r' satisfying the equation ""^(39)C_(3r-1)- ""^(39)C_(r^(2) )= ""^(39)C_(r^(2)-1) - ""^(39)C_(3r) is

The number of values of r satisfying the equation,39C_(3r-1)-39C_(r^(2))=39C_(r^(2)-1)-39C_(3r) is :

The number of values of r satisfying the equation 69C_(3r-1)-69C_(r^(2))=^(69)C_(r^(2)-1)-6 is a.1 b.2 c.3d.7

The number of values of r satisfying the equation C(69,3r-1)-C(69,r^(2))=C(69,r^(2)-1)-C(69,3r) is (A)1(B)2(C) 3( textrmD ) 7

Find the value of the determinant |(.^(n)C_(r-1),.^(n)C_(r),(r+1)^(n+2)C_(r+1)),(.^(n)C_(r),.^(n)C_(r+1),(r+2)^(n+2)C_(r+2)),(.^(n)C_(r+1),.^(n)C_(r+2),(r+3)^(n+2)C_(r+3))|