Mathematics - 27 September 2007

how do i integrate:

( sin (1/x) ) / x^2 dx

i know i take the substitution of u=1/x becos it says in the question.

:-)

2007-09-27 03:49:20 · 3 answers · asked by hyperpringle 1

can somebody explain me how do i solve this problem -t/5=9

2007-09-27 03:42:36 · 13 answers · asked by Anonymous

What function y = f(x) describes the parabola y = x² that has been tilted 45°, so that f(0) = 0, and x = f(y). That is, the function y = f(x) is its own inverse?

2007-09-27 03:31:55 · 3 answers · asked by Scythian1950 7

In S_3 find elements a and b such that lal = 2 and lbl=2, but labl=3?

2007-09-27 03:28:11 · 2 answers · asked by ClooneyIsAGenius 2

2007-09-27 03:25:50 · 6 answers · asked by tankwillmsg 1

2007-09-27 03:24:25 · 1 answers · asked by Anonymous

Do odd permutations of S_n form a group? Explain?

I know that they DO NOT because the identity is even. But I dont know how to show that.

2007-09-27 03:22:32 · 4 answers · asked by ClooneyIsAGenius 2

Simplify.

5×{(300 - 40 ÷ 5) - [3×24 - (8 - 2× 3)]}

2007-09-27 03:20:29 · 5 answers · asked by V.S. 2

f=9/5C+32. What is the fahrenheit temp that corresponds to each of the following Celsius temps: -10,0,15,100

2007-09-27 03:15:06 · 7 answers · asked by renae c 2

a =
(1 2 3 4 5 6 )
(3 1 4 5 6 2 )
b =
(1 2 3 4 5 6)
(5 2 4 3 1 6)

Calculate ba^2

what is the order of a?

what is a^100?

2007-09-27 03:07:56 · 2 answers · asked by ClooneyIsAGenius 2

which of the following equations expresses the total cost (c) of printing t number of shirts?

2007-09-27 01:56:07 · 2 answers · asked by Shival G 1

2007-09-27 01:53:29 · 8 answers · asked by Louise J 1

Help me solve this equation using susbtitution....?

2007-09-27 01:40:02 · 9 answers · asked by Anonymous

Not sure how to approach this, any ideas?

The purchasing power of the 1983 dollar is modeled by P(t) = 3.818e^-0.0506t where t is the number of years after 1960. In what year will the purchasing power of the 1983 dollar be $0.25?

2007-09-27 01:35:33 · 2 answers · asked by Anonymous

The number of stamps that May and Henry had at first was in the ratio of 3 : 1. After May bought 36 stamps and Henry sold 20 stamps, May then had 5 times as many stamps as Henry. How many stamps did Henry have at first? The answer is 68. But I do not know the steps. Can someone help, but pls do not use algebra. thks!

2007-09-27 01:33:25 · 2 answers · asked by evabree 1

Xavier, Yati and Zachary shared some marbles. Xavier had 1/3 of what Yati and Zachary had. Yati had 1/5 of what Xavier and Zachary had. Xavier had 24 fewer marbles than Zachary. How many marbles do they have altogether? Answer is 72 but I do not know the steps. Can someone help, pls do not use algebra. thks!

2007-09-27 01:30:20 · 1 answers · asked by evabree 1

Give the definite integral from 0 to infinity of cos x / sqrt{x} dx. (ie the function is x^{-1/2} cos x..

2007-09-27 01:05:07 · 1 answers · asked by Anonymous

2007-09-27 00:47:13 · 9 answers · asked by vivica7604 1

JACK'S CARAFE HOLDS 5 2/3 CUPS OF COFFEE. HE HAS COFFEE MUGS THAT HOLD 3/4 OF A CUP. HOW MANY MUGS CAN HE FILL? IF THERE IS COFFEE LEFT OVER,WHAT FRACTION OF A MUG WILL BE LEFT OVER?

2007-09-27 00:37:44 · 11 answers · asked by Ireney Weeney Beany Poo 2

evaluate the following integrals

i) Integrate (y log y) dy

how do i do this, it's in a revision book but i cant remember ever doin it.

thanks

2007-09-27 00:14:24 · 2 answers · asked by hyperpringle 1