Question

Find the 11th term of the geometric sequence 10,-40,160

Answer 1

For a geometric sequence:

`10,-40,160`

Given data:

The first term of the sequence is 10

The second term of the sequence is -40

The third term of the sequence is 160

The general formula for a geometric sequence is

`T_n=ar^(n-1)`

To get the 11th term, n=11

The common ratio is

`(T_2)/(T_1)=(-40)/(10)=-4`

The parameters we