Find the 4th Term -4 , 8 , -16

, ,
This is a geometric sequence since there is a common ratio between each term. In this case, multiplying the previous term in the sequence by gives the next term. In other words, .
Geometric Sequence:
This is the form of a geometric sequence.
Substitute in the values of and .
Multiply by .
Substitute in the value of to find the th term.
Subtract from .
Raise to the power of .
Multiply by .
Find the 4th Term -4 , 8 , -16

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