Explicit Rule

Explicit Rule

Ketchup

To get the second term, 8, you take your first term, 5, and add 3 once. To get the third term, you add three again. You could also say the third term is equal to the first term, 5, plus 3 twice. You are always adding the common difference one less time than the position number.

Multiple Choice

In the formula f(n)=3+2(n-1), what is the first term?

• 3

• 2

• I don't know

Multiple Choice

If I wanted to find f(342), which formula would you prefer to use?

• explicit

• recursive

Multiple Choice

Is the following solved correctly? Find the 20th term: f(n)=3+4(n-1)

f(n)=3+4(19)

f(n)=79

• Solved correctly

• Solved incorrectly

Multiple Choice

Write an explicit rule for the sequence: 4, 7, 10, 13, 16

• f(n)=3+4(n-1)

• f(n)=1+3(n-1)

• f(n)=f(1)+3(4-1)

• f(n)=4+3(n-1)