15 Sums of terms in a sequence
Why it's on BrighterTube
From a channel a BrighterTube curator approved in full · 80% confidenceFrom a channel Lumen includes in full: Khan Academy's main channel holds thousands of free, standards-aligned lessons across maths, science, economics and the humanities, taught step by step on a digital blackboard by Sal Khan and subject experts.
What you'll learn
A 3-minute video from Khan Academy's catalogue; the title names its topic.
Video by Khan Academy, played through YouTube's embedded player.