Identify Limit Form: Identify the form of the limit.We need to determine the form of the limit as x approaches 2. To do this, we substitute x with 2 in the expression (x−2)/(1−3x−5).limx→21−3x−5x−2=1−3⋅2−52−2=1−6−50=1−10=00This is an indeterminate form, which means we need to apply further techniques to evaluate the limit.
Apply Conjugate Multiplication: Apply conjugate multiplication to simplify the expression.To resolve the indeterminate form, we can multiply the numerator and the denominator by the conjugate of the denominator. The conjugate of 1−3x−5 is 1+3x−5.limx→21−3x−5x−2⋅1+3x−51+3x−5
Perform Multiplication: Perform the multiplication.Now we multiply the numerators and the denominators.Numerator: (x−2)(1+3x−5)Denominator: (1−3x−5)(1+3x−5)The denominator simplifies to 1−(3x−5)2 by the difference of squares formula.
Simplify Denominator: Simplify the denominator.We simplify the denominator using the difference of squares formula.Denominator: 1−(3x−5)2=1−(3x−5)=1−3x+5=6−3x
Simplify Numerator: Simplify the numerator.We expand the numerator.Numerator: (x−2)(1+3x−5)=x+x3x−5−2−23x−5
Combine Like Terms: Combine like terms in the numerator.Combining like terms, we get:Numerator: x−2+x3x−5−23x−5This simplifies to: (x−2)+3x−5(x−2)
Factor Out Common Term: Factor out (x−2) from the numerator.We factor (x−2) out of the numerator to get:Numerator: (x−2)(1+3x−5)
Cancel Common Terms: Cancel out the common terms.We now have a common term (x−2) in both the numerator and the denominator that we can cancel out.x→2lim(x−2)(1+3x−5)/(6−3x)= x→2lim(1+3x−5)/(6−3x)
Substitute x in Expression: Substitute x with 2 in the simplified expression.Now that we have canceled the common terms, we can substitute x with 2 in the expression to find the limit.limx→2(1+3x−5)/(6−3x)= (1+3∗2−5)/(6−3∗2)= (1+6−5)/(6−6)= (1+1)/0= (1+1)/0= x0
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