Zadanie 10.12R-1.
a) $a_n=\sqrt{n+9}-\sqrt{n+4}$
b) $a_n=\sqrt{n+2}-\sqrt{n+1}$
c) $a_n=\sqrt{4n-1}-\sqrt{3n+5}$
d) $a_n=\sqrt{4n^2+n}-2n$
e) $a_n=n-\sqrt{n^2-n}$
f) $a_n=\sqrt{2n^2+4}-\sqrt{n^2+5}$
g) $a_n=\sqrt{6n^2+n}-\sqrt{6n^2-n}$
h) $a_n=\big(\sqrt{3n+2}-\sqrt{3n+1}\big)$
i) $a_n=\big(\sqrt{4n-3}-\sqrt{2n+10}\big)$
j) $a_n=\big(\sqrt{n^2+2n-1}-n\big)$
k) $a_n=\big(\sqrt{n^2+2}-\sqrt{2n^2+3}\big)$
l) $a_n=\big(\sqrt{2n^2+1}-\sqrt{n^2+2}\big)$
m) $a_n=\big(\sqrt{2n^2-n}-\sqrt{2n^2+3n+4}\big)$
n) $a_n=\sqrt{n}-\sqrt{n+2}$
o) $a_n=\sqrt{n^2+1}-\sqrt{n}$