The correct answer is:
S5=a−32ar5(1−2r)
upper S subscript 5 baseline equals Start Fraction a minus 32 a r superscript 5 baseline over left parenthesis 1 minus 2 r right parenthesis End Fraction
Which of the following is the sum of the first five terms of the geometric series whose first term is%C2%A0a%C2%A0and that has a common ratio of 2r%0A ?(1 point)%0AResponses%0A%0AS5=a−32ar5(1−2r)%0Aupper S subscript 5 baseline equals Start Fraction a minus 32 a r superscript 5 baseline over left parenthesis 1 minus 2 r right parenthesis End Fraction%0A%0AS5=a−32ar5(1+2r)%0Aupper S subscript 5 baseline equals Start Fraction a minus 32 a r superscript 5 baseline over left parenthesis 1 plus 2 r right parenthesis End Fraction%0A%0AS5=a−32ar5(1−r)%0Aupper S subscript 5 baseline equals Start Fraction a minus 32 a r superscript 5 baseline over left parenthesis 1 minus r right parenthesis End Fraction%0A%0AS5=a−2ar5(1−2r)%0Aupper S subscript 5 baseline equals Start Fraction a minus 2 a r superscript 5 baseline over left parenthesis 1 minus 2 r right parenthesis End Fraction%0ASkip to navigation%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A
1 answer
2 answers