Please help me with this calculus question

[HeidiD]

I've forgotten everything learned in college. :tongue_smilie:

From Life of Fred, page 38

"using the delta process, find limit of ΔY / ΔT as ΔT approaches 0 for y=1/ T ^2"

My question is, how does one square or multiply a delta by another delta?

eg. (T+ΔT) X (T+ΔT)

[Jane in NC]

Delta T is an increment. Hence (T + DT)^2 = T^2 + 2TDT + (DT)^2. (Not sure how you entered the nifty deltas...) Do not be tempted to separate the Delta from the T --treat it as an entity.

Have you found a common denominator for the limit problem that is posed?

Sorry, I don't own LoF but I hope this helps.

Jane

[HeidiD]

Delta T is an increment. Hence (T + DT)^2 = T^2 + 2TDT + (DT)^2. (Not sure how you entered the nifty deltas...) Do not be tempted to separate the Delta from the T --treat it as an entity.

Have you found a common denominator for the limit problem that is posed?

Sorry, I don't own LoF but I hope this helps.

Jane


Thanks so much, Jane. I really appreciate it! The nifty deltas - copied and pasted. :)