Mathematics
Grade10
Easy

Question

The first term of the sequence a subscript 7 end subscript equals 19 open parentheses fraction numerator 7 over denominator 8 end fraction close parentheses to the power of 3 end exponent is _______.

  1. 3    
  2. 7    
  3. 19    
  4. 8    

hintHint:

In a geometric progression, each successive term is obtained by multiplying the common ratio to its
preceding term. The formula for the nth term of a geometric progression whose first term is a and
common ratio is r is: an=arn-1.

The correct answer is: 19


    the given sequence a subscript 7 end subscript equals 19 open parentheses fraction numerator 7 over denominator 8 end fraction close parentheses to the power of 3 end exponent
    In a geometric progression, each successive term is obtained by multiplying the common ratio to its
    preceding term. The formula for the nth term of a geometric progression whose first term is a and
    common ratio is r is: an=arn-1.
    The first term of the sequence is 19.

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