Find the solution set of 5/x-3 < 3/1-x in interval notation.
If anyone could please show me how to solve this problem i would really apreciate it <3
If anyone could please show me how to solve this problem i would really apreciate it <3
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5/(x - 3) < 3/(1 - x)
It helps to first state the domain of the two functions. No denominator can equal 0, ever. So:
5/(x - 3) < 3/(1 - x) | x ≠ 1 and x ≠ 3
Multiply both sides by (1 - x)(x - 3). The constraints remain.
5(1 - x) < 3(x - 3) | x ≠ 1 and x ≠ 3
5 - 5x < 3x - 3 | x ≠ 1 and x ≠ 3
-8x < -8 | x ≠ 1 and x ≠ 3
8x > 8 | x ≠ 1 and x ≠ 3 ... The rule of opposites for inequalities.
x > 1 | x ≠ 1 and x ≠ 3
x > 1 | x ≠ 3 ... Non-redundance.
The variable x can equal anything greater than 1 except for 3. The answer will use nothing but open intervals because the bounds 1 and 3 are not included.
5/(x - 3) < 3/(1 - x)
x ϵ (1, 3)U(3, ∞)
"Variable x is an element of the set of all values between 1 and 3 in union with the set of all values between 3 and infinity."
It helps to first state the domain of the two functions. No denominator can equal 0, ever. So:
5/(x - 3) < 3/(1 - x) | x ≠ 1 and x ≠ 3
Multiply both sides by (1 - x)(x - 3). The constraints remain.
5(1 - x) < 3(x - 3) | x ≠ 1 and x ≠ 3
5 - 5x < 3x - 3 | x ≠ 1 and x ≠ 3
-8x < -8 | x ≠ 1 and x ≠ 3
8x > 8 | x ≠ 1 and x ≠ 3 ... The rule of opposites for inequalities.
x > 1 | x ≠ 1 and x ≠ 3
x > 1 | x ≠ 3 ... Non-redundance.
The variable x can equal anything greater than 1 except for 3. The answer will use nothing but open intervals because the bounds 1 and 3 are not included.
5/(x - 3) < 3/(1 - x)
x ϵ (1, 3)U(3, ∞)
"Variable x is an element of the set of all values between 1 and 3 in union with the set of all values between 3 and infinity."
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I know what I did wrong! The sixth line should read 5 - 5x < 3x - 9 | x ≠ 1 and x ≠ 3 .
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if x>3 then: 5(1-x)>3(x-3) which yields x<14/8 : contradiction
if 114/8 or x>1.75 which yields the interval (1.75,3)
if x<1 then: 5(1-x)>3(x-3) which yields x<14/8 considering both of them, x<1 holds:
solution set interval is (-infinity,1) and (1.75,3)
if 1
if x<1 then: 5(1-x)>3(x-3) which yields x<14/8 considering both of them, x<1 holds:
solution set interval is (-infinity,1) and (1.75,3)