Question

PLEASE HELP! MEDAL/FAN
A skier has decided that on each trip down a slope, she will do 2 more jumps than before. On her first trip she did 6 jumps. Derive the sigma notation that shows how many total jumps she attempts from her fourth trip down the hill through her twelfth trip. Then solve for the number of total jumps from her second to tenth trips.

the summation of 2 i plus 4 from i equals 2 to 10. ; 144 jumps

the summation of 2 i plus 4 from i equals 2 to 10. ; 180 jumps

the summation of 4 i plus 2 from i equals 2 to 10. ; 234 jumps

the summation of 4 i plus 2 from i equals 2 to 10. ; 306 jumps

Answer 1

@hoblos

Answer 2

this is what the answer choices look like...

Answer 3

so since the question says "she will do 2 more jumps than before" i think the answer could be c or d?

Answer 4

"she will do 2 more jumps than before" means that the common difference between each two jumps is 2

thus it must multiply the variable showing the number of the jump

Answer 5

so that means it has to be 2 times the variable?

Answer 6

yeah

Answer 7

and since in the trip number 1 she jumped 6 times
then the constant for 0 jumps is 4

Answer 8

ok, and I know how to plug in the numbers and solve for the sum, so I think I got it now! thanks! :D

Answer 9

any time :)

Answer 10

:D