एक अंकगणितीय अनुक्रम की रचना कीजिए जिसका दसवाँ पद 50 है।
एक अंकगणितीय अनुक्रम की रचना कीजिए ताकि दसवां पद 50 हो।

फीचर पद की सुविधा का उपयोग करके, हम पहले तीन पद निकाल सकते हैं।

Let the first three terms be a, b, and c.
Then, according to the given condition, we have

a + (b - a) + (c - b) + ... + (50 - (49)an) = 50

Simplifying this expression, we get

50 = a + n(b - a) + (n - 1)(c - b) 
      + (n - 2)(d - c) + ... + (1)(50 - (49)(n - 1)a)

= a (50 - (49)n) + b(n - 1)(n - 2)/2 - a(n - 1)^2 + c(n - 2)(n - 3)/2 
      - b(n - 2)(n - 3) + d(n - 3)(n - 4)/2 - c(n - 4)(n - 5)/2 + ...

We can now choose a, b, and c to satisfy this equation. 
For simplicity, let's choose a = b = c = 1.

50 = (50 - 49n) + (n - 1)(n - 2)/2 - (n - 1)^2 + (n - 2)(n - 3)/2 
      - (n - 2)(n - 3) + (n - 3)(n - 4)/2 - (n - 4)(n - 5)/2 + ...

Expanding and simplifying this equation, we get

n^2 - n - 100 = 0

Solving for n, we get n = 10 (discard the negative solution).
Therefore, our arithmetic sequence is:

1, 1, 1, 3, 5, 7, 9, 11, 13, ..., 91

The 10th term is 19 and the 50th term is 91.