geom_sum_mul_add

∀ {R : Type u_1} [inst : Semiring R] (x : R) (n : ℕ), (∑ i ∈ Finset.range n, (x + 1) ^ i) * x + 1 = (x + 1) ^ n

Defined in: Mathlib.Algebra.Ring.GeomSum
Cited by: 2 results in Mathlib
Foundations: Depth 69 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: Semiring

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