Math Problem Statement

answer from number 1 to 5

Solution

The image contains a math problem asking to find the "nth" term of each arithmetic sequence. There are five sequences provided, and the specific terms to be found are:

  1. Sequence: 2, 5, 8, ... (Find the 97th term)
  2. Sequence: 3, 5, 7, ... (Find the 200th term)
  3. Sequence: 1, 12, 0, ... (Find the 16th term)
  4. Sequence: 5, 11, 17, ... (Find the 99th term)
  5. Sequence: 26, 22, 18, ... (Find the 40th term)

Solution Approach:

The general formula for the nth term of an arithmetic sequence is: an=a1+(n1)×da_n = a_1 + (n-1) \times d Where:

  • ana_n is the nth term,
  • a1a_1 is the first term,
  • dd is the common difference,
  • nn is the term number.

Let's solve each sequence:

1. Sequence: 2, 5, 8, ...

  • First term (a1a_1): 2
  • Common difference (dd): 52=35 - 2 = 3
  • Term to find: 97th term

a97=2+(971)×3=2+96×3=2+288=290a_{97} = 2 + (97-1) \times 3 = 2 + 96 \times 3 = 2 + 288 = 290

2. Sequence: 3, 5, 7, ...

  • First term (a1a_1): 3
  • Common difference (dd): 53=25 - 3 = 2
  • Term to find: 200th term

a200=3+(2001)×2=3+199×2=3+398=401a_{200} = 3 + (200-1) \times 2 = 3 + 199 \times 2 = 3 + 398 = 401

3. Sequence: 1, 12, 0, ...

  • First term (a1a_1): 1
  • Common difference (dd): 121=1112 - 1 = 11
  • Term to find: 16th term

a16=1+(161)×11=1+15×11=1+165=166a_{16} = 1 + (16-1) \times 11 = 1 + 15 \times 11 = 1 + 165 = 166

4. Sequence: 5, 11, 17, ...

  • First term (a1a_1): 5
  • Common difference (dd): 115=611 - 5 = 6
  • Term to find: 99th term

a99=5+(991)×6=5+98×6=5+588=593a_{99} = 5 + (99-1) \times 6 = 5 + 98 \times 6 = 5 + 588 = 593

5. Sequence: 26, 22, 18, ...

  • First term (a1a_1): 26
  • Common difference (dd): 2226=422 - 26 = -4
  • Term to find: 40th term

a40=26+(401)×(4)=26+39×(4)=26156=130a_{40} = 26 + (40-1) \times (-4) = 26 + 39 \times (-4) = 26 - 156 = -130

Final Answers:

  1. 97th term: 290
  2. 200th term: 401
  3. 16th term: 166
  4. 99th term: 593
  5. 40th term: -130

Would you like further details or have any questions about this solution?


Related Questions:

  1. How do you find the common difference in an arithmetic sequence?
  2. What is the sum of the first n terms of an arithmetic sequence?
  3. How do you derive the formula for the nth term of an arithmetic sequence?
  4. Can arithmetic sequences have a negative common difference?
  5. What happens if the common difference in an arithmetic sequence is zero?
  6. How does an arithmetic sequence differ from a geometric sequence?
  7. Can the terms of an arithmetic sequence be fractions or decimals?
  8. How would you solve for the 0th term in an arithmetic sequence?

Tip:

When solving arithmetic sequences, always double-check your common difference dd to ensure accuracy throughout your calculations.

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Math Problem Analysis

Mathematical Concepts

Arithmetic Sequences

Formulas

Formula for the nth term of an arithmetic sequence

Theorems

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Suitable Grade Level

Grades 7-9