Arthhimetic sequences

[vocal cradle]

For a question like this, why isn't the drop point (200) considered term 1??? I'm confused

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[red sentinel]

if you could send the entire question pls
I'll understand it properly and then help

or nvm I'll try it

the drop point 200 cm is not considered the first term because according to the question (if I'm not wrong), the progression should begin from the first bounce, not from the drop point of the ball

and like that it will keep on decreasing with each successive bounce

[vocal cradle]

yeah, that's right

but isnt the first the number 200

200 * 0.08 = x

then

x * 0.08

so isnt 200 a part of the progression?

[red sentinel]

the only logical explaination im getting is that, in this arithmetic progression, an entire bounce of the ball from one point to the other would be considered as a term
but the drop point is not an entire bounce, it's more of a half bounce and so is not included in the progression

i hope this clears it up a bit

[vocal cradle]

wdym by half bonce

bounce

also, for this one, why are we using the infinite series formula even though it's last term is going to be 0m

some other person considers t1 as the initial point...

[feral pilot]

The total distance the ball have travelled u need to find from the start until the ball stops moving

[vocal cradle]

doesnt htat mean it's finite

because it ends at zero

[feral pilot]

Yes

If a sequences keep decreasing

[vocal cradle]

then why do we use the infinite equation

S(infinity)