Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

Given 
f(x)=-x+3 and 
g(x)=(1)/(2)x^(2)-1, which is a solution to 
f(x)=g(x)
A) -2
B) -1
C) 1
D) 2

Given f(x)=x+3 f(x)=-x+3 and g(x)=12x21 g(x)=\frac{1}{2} x^{2}-1 , which is a solution to f(x)=g(x) f(x)=g(x) \newlineA) 2-2\newlineB) 1-1\newlineC) 11\newlineD) 22

Full solution

Q. Given f(x)=x+3 f(x)=-x+3 and g(x)=12x21 g(x)=\frac{1}{2} x^{2}-1 , which is a solution to f(x)=g(x) f(x)=g(x) \newlineA) 2-2\newlineB) 1-1\newlineC) 11\newlineD) 22
  1. Set Equation Equal: To find the solution to f(x)=g(x)f(x) = g(x), we need to set the two functions equal to each other and solve for xx. So, we have the equation x+3=(12)x21-x + 3 = \left(\frac{1}{2}\right)x^2 - 1.
  2. Form Quadratic Equation: First, let's move all terms to one side of the equation to set it to zero and form a quadratic equation.\newlineWe add xx and subtract 33 from both sides to get:\newline(12)x2+x4=0(\frac{1}{2})x^2 + x - 4 = 0.
  3. Eliminate Fraction: To make the equation easier to solve, we can multiply every term by 22 to get rid of the fraction:\newline2×(12)x2+2×x2×4=0×22 \times (\frac{1}{2})x^2 + 2 \times x - 2 \times 4 = 0 \times 2,\newlinewhich simplifies to:\newlinex2+2x8=0x^2 + 2x - 8 = 0.
  4. Factor Quadratic Equation: Now, we need to factor the quadratic equation, if possible.\newlineThe factors of 8-8 that add up to 22 are 44 and 2-2.\newlineSo, we can write the equation as:\newline(x+4)(x2)=0(x + 4)(x - 2) = 0.
  5. Apply Zero Product Property: Next, we apply the zero product property, which states that if a product of two factors is zero, then at least one of the factors must be zero.\newlineSo, we set each factor equal to zero:\newlinex+4=0x + 4 = 0 or x2=0x - 2 = 0.
  6. Solve for x: Solving each equation for x gives us the possible solutions: x=4x = -4 or x=2x = 2.
  7. Check Answer Choices: We need to check which of these solutions is given in the answer choices.\newlineThe choices are A) 2-2, B) 1-1, C) 11, D) 22.\newlineOnly x=2x = 2 is in the answer choices, so x=4x = -4 is not a valid option for this problem.
  8. Verify Solution: Finally, we can verify that x=2x = 2 is indeed a solution by substituting it back into the original equations f(x)f(x) and g(x)g(x) to see if they are equal.\newlineFor f(x)f(x), we have f(2)=2+3=1f(2) = -2 + 3 = 1.\newlineFor g(x)g(x), we have g(2)=(12)(2)21=(12)(4)1=21=1g(2) = (\frac{1}{2})(2)^2 - 1 = (\frac{1}{2})(4) - 1 = 2 - 1 = 1.\newlineSince f(2)=g(2)f(2) = g(2), x=2x = 2 is a solution to f(x)=g(x)f(x) = g(x).

More problems from Transformations of functions