1. A weightlifter is lifting weights, and increases the weight lifted on each lift. On the first lift, they lift 10kg. On the fourth lift, they are lifting 16kg.
a. How much more are they lifting each time?
[1 points)
b. Find the amount they lift on the 10th lift.
(2 points)
c. Find the sum of weight lifted through the 10th lift.
[3 points)

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

i think is 3 and 6. this took me 10 min to think.hope to and hope that my answer is brainliest.(follow me )