如何计算Sequence
learn.whatIsHeading
Sequence analyzer studies arithmetic/geometric progressions and general sequences; finds patterns, nth terms, sums.
分步指南
- 1Input first few sequence terms or formula
- 2Identify type: arithmetic (constant difference), geometric (constant ratio), or other
- 3Calculate any term and sum
例题解析
输入
2, 4, 8, 16, ...
结果
Geometric: r=2, aₙ=2×2ⁿ⁻¹, sum n terms = 2(2ⁿ-1)
常见错误注意事项
- ✕Confusing arithmetic and geometric
- ✕Forgetting starting index
常见问题
How do you sum infinite geometric series?
S = a/(1-r) if |r|<1; diverges if |r|≥1.
准备好计算了吗？尝试免费的 Sequence 计算器
自己尝试一下 →