Find the sum of: 20 terms of the series 2 + 6 + 18 + …

Find the sum of:
(i) 20 terms of the series 2 + 6 + 18 + …
(ii) 10 terms of series 1 + √3 + 3 + …
(iii) 6 terms of the GP. 1, , , …
(iv) 20 terms of the GP. 0.15, 0.015, 0.0015,…
(v) 100 terms of the series 0.7 + 0.07 + 0.007 +…
(vi) 5 terms and n terms of the series
(vii) n terms of the G.P. √7, √21, 3√7, …
(viii)n terms of the G.P. 1, -a, a², -a³, … (a ≠ -1)
(ix) n terms of the G.P. x³, x⁵ , x⁷, … (x ≠ ±1).

Solution:

More Solutions:

• Evaluate the geometric Progression.
• Find the sum of the series.
• Find the sum of the following series to n terms:
• The list of numbers – 10, – 6, – 2, 2, … is
• The 30th term of the A.P. 10, 7, 4, … is
• The 4th term from the end of the A.P. -11, -8, -5, …, 49 is