21 May '04 15:48

i had my advanced higher maths paper today. it's a kind of combination of parts of the 1st and 2nd year uni courses. my head hurts...

i had 2 problems...one i kinda bluffed (i'll start anohter thread about thataone...), and then htere was this one. i managed all of it, apart form the little 2 mark bit at the end. twas surprisingly easy for the last question of the paper...

16. a. Obtain the sum of the series 8+11+14+...+56. (2)

b. A geometric sequence of positive terms has first term 2, and the sum of the first three terms is 266. Calcualte the common ratio. (3)

c. An arithmetic sequence, A, has first term

and now-the bit i couldn't do...for 2 marks...:

Obtain the smallest value of

there you go-so, can snyone solve the last bit? (the rest is easy, btw...)

i had 2 problems...one i kinda bluffed (i'll start anohter thread about thataone...), and then htere was this one. i managed all of it, apart form the little 2 mark bit at the end. twas surprisingly easy for the last question of the paper...

16. a. Obtain the sum of the series 8+11+14+...+56. (2)

b. A geometric sequence of positive terms has first term 2, and the sum of the first three terms is 266. Calcualte the common ratio. (3)

c. An arithmetic sequence, A, has first term

*a*and common difference 2, and a geometric sequence, B, has first term*a*and common ration 2. The first four terms of each sequence have the same sum. Obtain the value of a. (3)and now-the bit i couldn't do...for 2 marks...:

Obtain the smallest value of

*n*such that the sum to*n*terms for sequence B is more than**twice**the sum to*n*terms for sequence A. (2)there you go-so, can snyone solve the last bit? (the rest is easy, btw...)