The right response is (b) 243.
Answer:
The following formula can be used to find the sum of a geometric series’ first n terms:
a_1 (1 – r^n) / (1 – r) = S_n
where:
The sum of the first n terms is S_n.
The first term is a_1.
R is the standard ratio.
The number of terms is n.
We must determine the sum of the first six terms (n = 6) given that the first term (a_1) is 3. Any term can be divided by the preceding term to find the common ratio (r). The common ratio in this instance is 3, as each term is multiplied by three to obtain the subsequent term.
The values can now be entered into the formula:
3 (1 – 3^6) / (1 – 3) = S_6
3 (-728) / (-2) = S_6
S_6 equals 2184.
Justification:
The values in the answer choices are near 2184. But rather than asking for the sum of all the terms (infinite series), the question asks for the sum of the first six terms. As the number of terms tends to infinity, the series diverges (goes to positive or negative infinity) because the common ratio (3) is greater than 1.
Note: It is critical to determine how many terms (n) are being summed and to apply the appropriate formula. Additionally, when working with infinite geometric series, remember to take the series’ convergence into account.
The right response is (b) 243.
Answer:
The following formula can be used to find the sum of a geometric series’ first n terms:
a_1 (1 – r^n) / (1 – r) = S_n
where:
The sum of the first n terms is S_n.
The first term is a_1.
R is the standard ratio.
The number of terms is n.
We must determine the sum of the first six terms (n = 6) given that the first term (a_1) is 3. Any term can be divided by the preceding term to find the common ratio (r). The common ratio in this instance is 3, as each term is multiplied by three to obtain the subsequent term.
The values can now be entered into the formula:
3 (1 – 3^6) / (1 – 3) = S_6
3 (-728) / (-2) = S_6
S_6 equals 2184.
Justification:
The values in the answer choices are near 2184. But rather than asking for the sum of all the terms (infinite series), the question asks for the sum of the first six terms. As the number of terms tends to infinity, the series diverges (goes to positive or negative infinity) because the common ratio (3) is greater than 1.
Note: It is critical to determine how many terms (n) are being summed and to apply the appropriate formula. Additionally, when working with infinite geometric series, remember to take the series’ convergence into account.