Math Problem Statement

  1. If a1 = –17 and d = 4, find3. If a1 = –17 and d = 4, find

a22 of the arithmetic

sequence a22 of the arithmetic% sequence

Solution

To find the 22nd term (a22a_{22}) of the arithmetic sequence, we can use the formula for the nth term of an arithmetic sequence:

an=a1+(n1)×da_n = a_1 + (n - 1) \times d

Here:

  • a1=17a_1 = -17 (the first term),
  • d=4d = 4 (the common difference), and
  • n=22n = 22 (the term number we want to find).

Now, substitute the given values into the formula:

a22=17+(221)×4a_{22} = -17 + (22 - 1) \times 4

Simplify the expression:

a22=17+21×4a_{22} = -17 + 21 \times 4

a22=17+84a_{22} = -17 + 84

a22=67a_{22} = 67

So, the 22nd term of the arithmetic sequence is a22=67a_{22} = 67.

Would you like more details or have any questions?

Here are some related questions:

  1. What is the general formula for the nth term in an arithmetic sequence?
  2. How do you find the sum of the first n terms in an arithmetic sequence?
  3. How do you determine if a sequence is arithmetic?
  4. What happens if the common difference dd is negative?
  5. How can you find the common difference if you're given two non-consecutive terms?
  6. What is the 50th term of the same arithmetic sequence?
  7. How do you solve for nn when given ana_n, a1a_1, and dd?
  8. How do you derive the formula for the nth term in an arithmetic sequence?

Tip: In an arithmetic sequence, if you know the first term and the common difference, you can easily find any term using the formula for the nth term.

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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 9-12