NumericalModerate2 marks
2(iii)
15, 30, 60, 120 ...... are in G.P. (Geometric Progression).
Find the nth term of this G.P. in terms of n.
Topic: Geometric progression
Previous-year question practice database
Answer
Exam answer
Tₙ = 15·2ⁿ⁻¹
Explanation
For G.P. 15,30,60,120,…, a=15 and r=2.
More from Geometric Progression
Assertion (A): The 9th term of a Geometric Progression (G.P.) 6, −12, 24, −48, ... is a positive term.
Reason (R): The value of (−2)⁸ is always positive.
(A) is true and (R) is false.
(A) is false and (R) is true.
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).2026common ratio2026first term2026the value of 'n'2025hence find the sum of the 'n' terms of the G.P.2025How many terms of the above G.P. will give the sum 945 ?2024