Find the value of [ C(8,1) + C(8,2) + C(8,3) + C(8,4) + ------- C(8,7) ] is

Find the value of b^(2) - 4ac , if (i) a= 3,b= 9 , c = 6 (ii) a= 2, b = - 8 , c = 8 (iii) a= 1, b = 1 , c = 1 .

If C(n,8)= C(n, 6) , find C(n, 2)

C(8,0)/(6)-C(8,1)+6C(8,2)- is equal to

.^(n) C_(2) + .^(7)C_(3) = .^(8) C_(3)

The value of (sqrt(8))^(1/3) a.2 b.8 c.4 d.sqrt(2)

8C_(4)+^(8)C_(3)=^(9)C_(4)