a× a−1 = 1
True
False
a−1 = 1a So, a × a−1 = a × 1a = 1
p+1 is a factor of p10−1.
If A is involutary then|A|=1 or −1
13 is the zero of 3x-1
MPC + MPS > 1.
t = 1 is the solution of the equation 5t - 4 = 1.