Btec: Geometric Progressions 2

## Difficult

Q1) What is the nth term formula Un of 8,40,200,1000... ?
Q1) What is the sum the first 8 terms of 5,15,45,135,405... ?
Q1) The sum of the sequence 5,15,45,135... is 147620. How many terms does it contain?
Q2) What is the nth term formula Un of 3,6,12,24... ?
Q2) What is the sum the first 16 terms of 8,16,32,64,128... ?
Q2) The sum of the sequence 4,8,16,32... is 131068. How many terms does it contain?
Q3) What is the nth term formula Un of 10,30,90,270... ?
Q3) What is the sum the first 16 terms of 10,20,40,80,160... ?
Q3) The sum of the sequence 9,27,81,243... is 265716. How many terms does it contain?
Q4) What is the nth term formula Un of 9,27,81,243... ?
Q4) What is the sum the first 12 terms of 8,16,32,64,128... ?
Q4) The sum of the sequence 3,6,12,24... is 3069. How many terms does it contain?
Q5) What is the nth term formula Un of 6,30,150,750... ?
Q5) What is the sum the first 12 terms of 10,20,40,80,160... ?
Q5) The sum of the sequence 8,16,32,64... is 262136. How many terms does it contain?
Q6) What is the nth term formula Un of 7,35,175,875... ?
Q6) What is the sum the first 8 terms of 10,20,40,80,160... ?
Q6) The sum of the sequence 8,24,72,216... is 236192. How many terms does it contain?
Q7) What is the nth term formula Un of 6,18,54,162... ?
Q7) What is the sum the first 8 terms of 5,20,80,320,1280... ?
Q7) The sum of the sequence 9,27,81,243... is 265716. How many terms does it contain?
Q8) What is the nth term formula Un of 9,27,81,243... ?
Q8) What is the sum the first 16 terms of 8,16,32,64,128... ?
Q8) The sum of the sequence 8,24,72,216... is 236192. How many terms does it contain?
Q9) What is the nth term formula Un of 7,35,175,875... ?
Q9) What is the sum the first 8 terms of 7,21,63,189,567... ?
Q9) The sum of the sequence 10,20,40,80... is 327670. How many terms does it contain?
Q10) What is the nth term formula Un of 10,30,90,270... ?
Q10) What is the sum the first 12 terms of 1,2,4,8,16... ?
Q10) The sum of the sequence 8,24,72,216... is 236192. How many terms does it contain?