Posted by Zukii on Thursday, January 13, 2011 at 11:13pm.
solve
x2x+1>3

Calculus  Reiny, Friday, January 14, 2011 at 12:35am
x^2  x + 1 > 3
or
x^2 + x  1 > 3
case 1:
x^2 x  2 > 0
(x2)(x+1) > 0
critical values are 1 and 2
(if we look at the parabola y = x^2  x  2, the xintercepts are 1 and 2 and we want all values above the xaxis)
so x < 1 OR x > 2
case 2:
x^2 x + 4 < 0
the corresponding equation x^2  x + 4 = 0 has no real roots, so no value of x satisfies our inequation.
so x < 1 OR x > 2
Answer This Question
Related Questions
 Calculus  How do you us implicit differentiation to solve x( y + 2 )^5 = 8 x( y...
 Pre calculus  How do I solve this exponent problem? I understand the exponent ...
 mathcalculus  solve 3x8=2x+7 i not get how to solve this the 3 infront of ...
 Calculus math  how do i solve these quadratics? c=10000 9a+3b+c=7975 36a+6b+c=...
 calculus  I am suposed to apply L'Hospitals rule to solve. I can't seem to ...
 Calculus  solve for dv/du dQ/du= 38u + [(u+v)^2(18+19dv/du) (2(18u+19v)(u+v)(1...
 Calculus  Hello, I really need help on these two homework problem. >< In ...
 Help! Calculus  I am so confused on how to solve this problem. I have it set ...
 Calculus  I was able to solve (e), this is the only one I don't get. Determine ...
 COLLEGE CALCULUS. HELP!  the fundamental theorem of calculus, f(x)=∫(0,x...
More Related Questions