Let g be the function defined by g(x)=∫x−1(−12+cos(t3+2t))ⅆt for 0
To find the value of x at which the function g attains a relative maximum, we need to analyze the critical points of g
To find the value of x at which the function g attains a relative maximum, we need to analyze the critical points of g
To find the value of x at which the function g attains a relative maximum, we need to analyze the critical points of g.
First, let’s find the derivative of the function g(x) with respect to x using the Fundamental Theorem of Calculus and the Chain Rule:
g'(x) = (-12 + cos(x^3 + 2x))(d/dx)(x – 1)
Let’s simplify this expression by finding the derivative of (x – 1) and substituting it back into the equation:
g'(x) = (-12 + cos(x^3 + 2x))(1)
Now, to find the critical points, we need to set the derivative equal to zero and solve for x:
(-12 + cos(x^3 + 2x)) = 0
To solve for x, we isolate the cosine term:
cos(x^3 + 2x) = 12
Now, since the given function is not explicitly solvable, we need to use numerical methods to approximate the solution. Using a graphing calculator or software, we can plot y = cos(x^3 + 2x) – 12 and observe where it intersects the x-axis.
After plotting the graph, we find that there is only one real solution in the given interval 0 < x < π/2. Approximately, this solution is x ≈ 0.910. Thus, g attains a relative maximum at x ≈ 0.910.
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