Sum of 'n' Terms of an A.P.

This example demonstrates the graphical calculation and visualization of the sum of the first 'n' terms of an arithmetic sequence. It involves core mathematical concepts such as arithmetic sequences, the formula for the sum of 'n' terms, vectors, and coordinate systems. Construction highlights include using commands like Textfield and Vector, along with objects like a (first term), d (common difference), n (number of terms), InputBox1, InputBox3, InputBox2, and various text and geometric elements like text1, b, c, text6, text8, A, B, u, text9, text2, text3, text4, e, text5, text10, text7. It is suitable for high school mathematics instruction, helping students understand and apply the sum formula for arithmetic sequences.