Substitute values for n=3,7, and 10 to find the terms.
- 6.8,- 22.8,- 34.8
Practice makes perfect
We are given an explicit rule of a sequence and are asked to find the third, seventh, and tenth terms.
A(n)=1.2+(n-1)(-4)
To do so, we will construct a table.
n
A(n)=1.2+(n-1)(-4)
A(n)
3
A( 3)=1.2+( 3-1)(-4)
-6.8
7
A( 7)=1.2+( 7-1)(-4)
-22.8
10
A( 10)=1.2+( 10-1)(-4)
-34.8
The third, seventh and tenth terms of this explicit sequence are -6.8, -22.8, and -34.8.
