#613 · Combinatorics · Binomial coefficients

With a coefficient inside

Find the coefficient of $x^{3}$ in $(1 + 2 x)^{5}$ .

~3 minAnswer checked instantlyBinomial coefficients

Stuck? A gentle nudge

Something off?

Workspace

Your answer

Loading the math keyboard…

Type naturally — sqrt, pi, / and ^ become notation. Any equivalent form is accepted. Press Enter to check.