# small changes

• July 20th 2009, 12:38 PM
Rose Wanjohi
small changes
A share has value \$y, x days after launch, given by y=x^(1/3),find the value of share 1000days after launching and use 'small changes' to find the value 1000 days after launching(Cool)
• July 20th 2009, 01:18 PM
HallsofIvy
Quote:

Originally Posted by Rose Wanjohi
A share has value \$y, x days after launch, given by y=x^(1/3),find the value of share 1000days after launching and use 'small changes' to find the value 1000 days after launching(Cool)

The first part of that is just arithmetic: $y= 1000^{1/3}= 10$.

I don't know what the second part of that means. "Small change" from what? Is it possible that the second part asked for the value after, say, 1001 days or 1008 days?
• July 21st 2009, 12:12 AM
Rose Wanjohi
no, 1001 is a big change it is something like 1000.1 days so say the small change can be
1000.1-1000=0.1
small change in y=dy/dx*small change in x=dy/dx*0.01