<p>Q) If the nth term of a sequence is given by the expression 2 x 4^(n-1) what is the units digit of the 131st term in the sequence?</p>
<p>A) 0
B) 2
C) 8
D) 3
E) 6</p>
<p>Answer: B</p>
<p>plug in 1, 2, 3, 4 into n and you get 2, 8, 32, 128
you can tell the pattern of unit digits is 2, 8, 2, 8 ....
2 for every odd term and 8 for every even term
so the answer is B</p>