等差数列计算器
求等差数列的项
公式
aₙ = a₁ + (n-1)d | Sₙ = n/2(a₁+aₙ)
Each term increases by constant difference d.
示例
a₁=2, d=3, n=10
a₁₀ = 29, Sum = 155.
常见问题
关于 等差数列计算器
Find any term and sum of an arithmetic sequence.
求等差数列的项
Each term increases by constant difference d.
a₁₀ = 29, Sum = 155.
Find any term and sum of an arithmetic sequence.