Number Sequences Video for sec 1

Consider the sequence 2, 4, 6, 8 . . .

what is the 2nd term of the sequence?

• 2

• 4

• 6

• 8

Answer explanation

2nd term = T2 = 4

Consider the sequence 25, 21, 17, 13 . . .

What is the common difference?

(a)  

Consider the sequence 4, 7 , 10 , 11 , 14

determine the nth term of the sequence

• 3n+1

• 4n+7

• 3n-1

Answer explanation

common difference = 3

1st term = 4

3+1 = 4

Tn = 3n + 1

Given that the General term of a sequence is 3n+2,

is 15 a term in the sequence?

• yes

• no

Answer explanation

Tn = 3n +2

Supposed that 15 is in the sequence

15= 3n+2

13=3n

n = 13/3

n = 4.333

n is not a whole number

15 is not a term in the sequence.

Type down any questions that you still have regarding what we have learn about number sequences.