NumericalModerate1.5 marks
6(b)
The first and last term of a Geometrical Progression (G.P.) are 3 and 96 respectively. If the common ratio is 2, find:
Sum of the n terms.
Topic: Geometric progression
Previous-year question practice database
Answer
Exam answer
a=3, r=2, n=6.
S₆ = 3(2⁶−1)/(2−1) = 3×63 = 189.
Answer: 189.
Explanation
Use the finite G.P. sum formula with n=6.
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