Sequences and series

  $a_n=a_{n-1}\ +\ 4$  

  $a_n=a_{n-1}-9$ 

 $a_n=a_{n-1}-5$  

 $a_n=a_{n-1}-4$  

$$a_n=a_{\left(n-1\right)}+8\ ;\ a_1=6$$

$$a_n=a_{\left(n+1\right)}+6;\ a_1=8$$

$$a_n=a_{\left(n+1\right)}+\ 8\ ;\ a_1=6$$

$$a_n=a_{\left(n-1\right)}+6\ ;\ a_{1\ }=\ 8$$

an = r • an-1

an= a1 + d (n - 1)

an= an-1 +d

an= a1 • rn-1

$$a_n=48\left(\frac{3}{2}\right)^{n-1}$$

$$a_n=48\left(\frac{5}{2}\right)^{n-1}$$

$$a_1=48$$

$$a_n=a_{n-1}\times\left(\frac{5}{3}\right)$$

$$a_1=48$$

$$a_n=a_{n-1}\times\left(\frac{3}{2}\right)$$

-5, -10, -15

-4,-9,-14

-6, -11, -16

5, 10, 15