" (v) "6^(c)

The value of sum_(r=0)^(6) (""^(6)C_(r )*""^(6)C_(6-4)) is equal to:

A B C is an isosceles triangle in which /_C=90o . If A C=6c m , then A B= 6sqrt(2)c m (b) 6c m (c) 2sqrt(6)c m (d) 4sqrt(2)c m

(""^(8) C_(0) )/(6) - ""^(8) C_1 + ""^(8) C_(2) . 6-""^(8) C_3 . 6^2 + ... + ""^(8) C_(8) .6^(7) is equal to (i) 0 (ii) 6^7 (iii) 6^5 (iv) (5^8)/(6)

If |{:(x,2),(18,x):}|=|{:(6,2),(18,6):}| , then x is equal to : (a) 6 (b) +-6 ( c) -6 0

._(6)^(14)C,._(6)^(13)C, ._(6)^(12)C what are these?