Posts Tagged ‘sequence’

Problem 739

 

Find the next term of the sequence: -600, 300, -150, …

 

Solution:-

 

Find the common ratio and multiply the previous term by that value.

75

Problem 736

Find the 100th term of the sequence: -4, -2, 0, 2, ….

 

Solution:-

 

Find the common difference and use the explicit formula for arithmetic sequences:  .

an = a1 + (n-1)d.

a1  = -2

n = 100

d = 2

194