Let A1, A2, A3, ..., An be narithmetic means between a and b, then A1 + A2 + A3 + ... + An = _____?
- n(a + b)/2
- n(a - b)/2
- n(a ÷ b)/2
- None of these
Explanation
In an arithmetic progression, the sum of n terms between a and b is given by: Sum = n(a+b)/2
This formula uses the first and last terms to find the total of evenly spaced values.
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