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lim_(x rarr5)(12 x-60)/(x^(2)-6x+5)=

limx512x60x26x+5= \lim _{x \rightarrow 5} \frac{12 x-60}{x^{2}-6 x+5}=

Full solution

Q. limx512x60x26x+5= \lim _{x \rightarrow 5} \frac{12 x-60}{x^{2}-6 x+5}=
  1. Substitute x=5x = 5: First, let's try to directly substitute the value of x=5x = 5 into the expression to see if it results in an indeterminate form.\newline(12×560)/(526×5+5)(12 \times 5 - 60) / (5^2 - 6 \times 5 + 5)
  2. Calculate Numerator and Denominator: Calculate the numerator and the denominator separately.\newlineNumerator: 12×560=6060=012 \times 5 - 60 = 60 - 60 = 0\newlineDenominator: 526×5+5=2530+5=05^2 - 6 \times 5 + 5 = 25 - 30 + 5 = 0
  3. Identify Indeterminate Form: Since both the numerator and the denominator equal 00, we have an indeterminate form of 0/00/0. We need to simplify the expression further to find the limit.
  4. Factor Denominator: Factor the quadratic expression in the denominator.\newlinex26x+5x^2 - 6x + 5 can be factored into (x5)(x1)(x - 5)(x - 1).
  5. Rewrite Limit Expression: Now, rewrite the limit expression with the factored denominator. limx512x60(x5)(x1)\lim_{x \rightarrow 5}\frac{12x - 60}{(x - 5)(x - 1)}
  6. Factor Numerator: Notice that the numerator 12x6012x - 60 can be factored as well. Factor out the common term 1212.12(x5)(x5)(x1)\frac{12(x - 5)}{(x - 5)(x - 1)}
  7. Cancel Common Term: Now, we can cancel out the common (x5)(x - 5) term from the numerator and the denominator.limx512(x1)\lim_{x \rightarrow 5} \frac{12}{(x - 1)}
  8. Find Limit: Finally, substitute x=5x = 5 into the simplified expression to find the limit.12(51)=124=3\frac{12}{(5 - 1)} = \frac{12}{4} = 3

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