Question

Compute the first 6 terms in the following sequence:

Answer 1

\[c _{n}= n + (n+1) + (n+2) +... + (2n)\]

Answer 2

start with n=1

Answer 3

for instance if n=7 u gotta go from 7 to 2n=14 so
\[ \large c_7=7+8+9+10+11+12+13+14 \]

Answer 4

so for n=1 i would have 1+2=3

Answer 5

yes

Answer 6

what about c2

Answer 7

omg so over thinking that!! i would have 2+3+4=9

Answer 8

well done