A sequence u1, u2, u3, … is defined by

u1=4 and un+1= 2/un for n≥1
a. Write down the values of u2 and u3
b. Describe the behaviour of the sequence

4 answers

please help me
un1 = 4
un2 = 4=2/4 = 1/2
un3 = 2/(1/2) = 4
un4 = 2/4 = 1/2
un5 = 2/ (1/2) = 4
un6 = 2 /4 = 1/2
well there is a certain predictability to this :)
How to calculate
u2