If x, y, z are all positive and are the pth, qth and rth terms of a geometric progression respectively, then the value of the determinant
equals
log(xyz)
(p - 1)(q - 1)(r - 1)
pqr
0
A binary sequence is an array of O's and 1's. The number of n-digit binary sequences which contain even number of 0's is
2n - 1
2n - 1
2n - 1 - 1n
2n
1
0
- 1
2
C.
- 1