1st Periodical Test in Mathematics 10

Give the next two terms of the given sequence:

 $\left\{3,5,7,9,11,...\right\}$  

• 12, 13

• 12, 14

• 13, 15

• 13, 16

Give the nth term of the sequence

 $\left\{3,5,7,9,11,...\right\}$  

•  $a_n=n+1$  

•  $a_n=n+2$  

•  $a_n=2n+1$  

•  $a_n=2n+2$  

What is the common difference of the sequence

 $\left\{5,\ 12,\ 19,\ 26,...\right\}$  

•  $d=4$  

•  $d=5$  

•  $d=6$  

•  $d=7$  

TRUE OR FALSE: 

Is  $\left\{11,22,44,...\right\}$   an arithmetic sequence?

• TRUE

• FALSE

Given  $a_n=5n-3$  , find $a_3$  .

•  $a_3=11$  

•  $a_3=12$  

•  $a_3=13$  

•  $a_3=14$  

Given $a_n=3^n+2$  , find  $a_4$  .

•  $a_4=83$  

•  $a_4=85$  

•  $a_4=86$  

•  $a_4=87$  

TRUE OR FALSE:

 $\left\{-2,\ 6,-18,\ \ 48,...\right\}$  is a geometric sequence?

• TRUE

• FALSE

Determine the common ratio : $\left\{5,15,45,135,..\right\}$  

• r = 1

• r = 2

• r = 3

• r = 4

Find the common ratio of $a_1=-2\ \ \ and\ \ \ a_3=-8$ . 

• r = 2

• r = 3

• r = 4

• r = 5

Give the sum of the finite geometric sequence.

 $S_6=\left\{1,\ 3,\ 9,...\right\}$  

•  $S_6=362$  

•  $S_6=363$  

•  $S_6=364$  

•  $S_6=365$