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Questions and Answers
What is the formula for the nth term of an arithmetic sequence?
What is the formula for the nth term of an arithmetic sequence?
- $a_n = a_1 imes (n-1)d$
- $a_n = a_1 + (n-1)d$ (correct)
- $a_n = a_1 imes d^{n-1}$
- $a_n = a_1 + nd$
What is the sum of the first 10 terms of the arithmetic sequence with first term $a_1 = 3$ and common difference $d = 4$?
What is the sum of the first 10 terms of the arithmetic sequence with first term $a_1 = 3$ and common difference $d = 4$?
- $S_{10} = 165$ (correct)
- $S_{10} = 120$
- $S_{10} = 300$
- $S_{10} = 235$
What is the common ratio in the geometric sequence with first term $a_1 = 2$ and 5th term $a_5 = 32$?
What is the common ratio in the geometric sequence with first term $a_1 = 2$ and 5th term $a_5 = 32$?
- 6
- 4 (correct)
- 8
- 2
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