Lovely series

(1+26+25612+25861218+)3= ?\left(1+\dfrac {2}{6}+\dfrac {2\cdot5}{6\cdot12}+\dfrac {2\cdot5\cdot8}{6\cdot12\cdot18}+\cdots\right)^3 = \ ?

×

Problem Loading...

Note Loading...

Set Loading...