Question

Find S10 for the series 2 + 7 + 12 + 17 +...

Answer 1

Sum of arithmetic series is:

\(\Large \color{Black}{\Rightarrow {n \over 2}(a_1 + a_n) }\)

Answer 2

To determine a10,

\(\Large \color{Black}{\Rightarrow 2 + (10 -1)5 }\)

\(\Large \color{Black}{\Rightarrow 2 + 45 = 47 }\)

Answer 3

So the formula would be:

\(\Large \color{Black}{\Rightarrow {10 \over 2}(2 + 45) }\)

\(\Large \color{Black}{\Rightarrow 5(47) }\)

\(\Large \color{Black}{\Rightarrow 235 }\)

Answer 4

Find the 6th term of a geometric sequence t3 = 444 and t7 = 7104.

Answer 5

3552

Answer 6

Find the 6th term of the sequence with t1 = -4 and tn = 5tn-1.

Answer 7

ap or gp

Answer 8

?

Answer 9

arithmetic series or geometric series

Answer 10

arithmetic