Any shortcut trik aplly in this sum???

KRISH · 27 Apr 2026

Thanks

Satya · 27 Apr 2026

The ratio of the sum of n terms of two APs is (7n + 1) : (4n + 27). Find the ratio of their 11^{th} terms. Hint: Substitute n = 2(11) - 1 = 21. 2. If the ratio of the sum of n terms of two arithmetic progressions is (3n + 8) : (7n + 15), find the ratio of their 12^{th} terms. Hint: Substitute n = 2(12) - 1 = 23. 3. The ratio of the sum of n terms of two APs is (n + 7) : (3n + 1). What is the ratio of their 7^{th} terms? Hint: Substitute n = 2(7) - 1 = 13.