9:
x/x+1 –1/x=1
a)1/3
b)1/2
c)–1/2
10:
1/x+1=x-1/x+5/x
a)–2
b)2
c){-3,-2}
2007-06-08 18:45:43 · 6 answers · asked by ~♥♥♥~ 3 in Science & Mathematics ➔ Mathematics
Question 9
x² - (x + 1) = x² + x
x² - x - 1 = x² + x
2x = - 1
x = - 1 /2
Option c)
Question 10
Assume brackets must appear somewhere in question.
Try:-
1 / (x + 1) = (x - 1) / x + 5 / x
x = (x - 1).(x + 1) + 5.(x + 1)
x = x² - 1 + 5x + 5
x² + 4x + 4 = 0
(x + 2)² = 0
x = - 2
Option a)
2007-06-09 06:26:58 · answer #1 · answered by Como 7 · 0⤊ 0⤋
9 c
10 a
2007-06-09 03:28:00 · answer #2 · answered by Anonymous · 0⤊ 1⤋
9: c x2-x-1/x(x+1) = 1 then x2-x-1-x2-x/x(x+1) = 0 so -2x-1=o x=-1/2 (c)
10: -2 (a)
2007-06-09 02:13:48 · answer #3 · answered by edcremonese 1 · 0⤊ 1⤋
a) 1/3
you need to put parenthesis to make the problem more clear.
2007-06-09 01:53:42 · answer #4 · answered by Sergio 2 · 0⤊ 1⤋
it seems you are putting all your multiple choice questions here. Haven't done your homework?
2007-06-09 02:03:30 · answer #5 · answered by swd 6 · 2⤊ 0⤋
c)-1/2
a)-2
2007-06-09 01:51:45 · answer #6 · answered by cranberry 5 · 0⤊ 1⤋