Dany jest ciąg (an) o wyrazie ogólnym an = n+1/2n. Wówczas a2*a3/a1 wynosi: A. 5 B. 6 C. 1/2 D. 2
a1=(1+1)/2*1=2/2=1
a2=(2+1)/2*2=3/4
a3=(3+1)/2*3=4/6=2/3
(a2*a3)/a1=(3/4*2/3)/1=3/4*2/3=2/4=1/2
odp c
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a1=(1+1)/2*1=2/2=1
a2=(2+1)/2*2=3/4
a3=(3+1)/2*3=4/6=2/3
(a2*a3)/a1=(3/4*2/3)/1=3/4*2/3=2/4=1/2
odp c
licze na naj