Wednesday

October 22, 2014

October 22, 2014

Posted by **Shohanur** on Saturday, July 5, 2014 at 11:33pm.

- Math -
**Damon**, Sunday, July 6, 2014 at 4:33amx = 1 and y = 10 -->1-.1 = .9

try others

x = 2 and y =9 --> 1/2 - 1/9

see?

- Math -
**Reiny**, Sunday, July 6, 2014 at 7:48amUsing Calculus ....

x+y = 11 ---> y = 11-x

S = 1/x - 1/y

= 1/x - 1/(11-x) = x^-1 - (11-x)^-1

dS/dx = -1/x^2 - 1/(11-x)^2

= 0 for a max/min of S

-1/(11-x)^2 = 1/x^2

-x^2 = 11-x^2

-2x^2 = 11

x^2 = -11/2

No real solution , there is no maximum

see Wolfram

http://www.wolframalpha.com/input/?i=plot+y+%3D+1%2Fx+-+1%2F%2811-x%29

1/x - 1/(11-x) becomes infinitely large as x ---> 0

**Answer this Question**

**Related Questions**

math - 5. The sum of 7 unequal positive integers is 61. What is the largest ...

mathematics - If a and b are positive integers, a+b<20, and the product of ab...

math - 10.If the average of four positive integers is 12, what is the largest ...

algebra!!!! please help me!!!! - The smallest possible positive value of 1−...

Math - The average of a set of five different positive integers is 360. The two ...

MAths - 4 distinct integers p, q, r and s are chosen from the set {1,2,3,…,16,17...

Maths!!! - 4 distinct integers p, q, r and s are chosen from the set {1,2,3,…,16...

mathematics - 4 distinct integers p, q, r and s are chosen from the set {1,2,3...

math - What is the largest possible integer that can be chosen as one of five ...

Math - Let S(n) denote the sum of digits of the integer n. Over all positive ...