Question
MATHEMATICS DEPARTMENT
HOLHDAY ASSIGNMENT GRADE 11
Due date: first week of reporting
- The first 3 terms of a geometric progression are
and
. Find the
-
a) Value of a
b)
term
c) sum of the first 4 terms
HOLHDAY ASSIGNMENT GRADE 11
Due date: first week of reporting
a) Value of a
b)
c) sum of the first 4 terms
Ask by Edwards Colon. in Zambia
Jan 02,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
a)
b)
c) Sum of the first 4 terms is 160
b)
c) Sum of the first 4 terms is 160
Solution

Sign in to Unlock Answers for Free!
A Learning Platform Trusted by Millions of Real Students and Teachers.

Answered by UpStudy AI and reviewed by a Professional Tutor
Like
The Deep Dive
To solve the problem, let’s dive into the world of geometric progressions (GPs)! Geometric progressions are sequences where each term after the first is found by multiplying the previous term by a fixed, non-zero number called the common ratio. In your case, the first three terms are
,
, and
. Setting the ratio of successive terms equal gives us a neat equation; don’t forget to simplify!
Now, for the
term of a GP, the formula is given by
, where
is the common ratio you would find from the terms. And for summing the first four terms, the sum
of the first
terms is given by
(as long as
). Just plug in your values for
and
once you find them!
A common mistake here is mixing up the order of operations. Remember to keep your ratios consistent. Not simplifying correctly or missing negative signs can trip you up when calculating the common ratio. So, double-check your math and keep an eye on those divine little digits!