Q1138 (Q1138): Difference between revisions

${\displaystyle a(x)=1+{\frac {x^{3}}{3!}}+{\frac {x^{6}}{6!}}+\ldots ,b(x)=x+{\frac {x^{4}}{4!}}+{\frac {x^{7}}{7!}}+\ldots ,c(x)={\frac {x^{2}}{2!}}+{\frac {x^{5}}{5!}}+{\frac {x^{8}}{8!}}+\ldots }$