Solve the equation.(-4)2 + 4x = 6x + 83
A. 248
B. -264
C. 264
D. -248
Answer: D
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Determine whether the Fourier series of the given function will include only sine terms, only cosine terms, or both sine terms and cosine terms.f(x) = 
A. only sine terms B. both sine and cosine terms C. only cosine terms
Find the product AB.A = 
, B = 
A. 
B. 
C. 
D. 
Use calculus to find any critical points and inflection points of the given function. Then determine the concavity of the function and the intervals over which it is increasing/decreasing.f(x) = 6 - e-x
A. Critical points: critical point at x = 0 Inflection points: none Concavity: concave down for all real numbers Increasing: increasing for all x < 0 and decreasing for all x > 0 B. Critical points: none Inflection points: none Concavity: concave up for all real numbers Decreasing: decreasing for all real numbers C. Critical points: none Inflection points: point of inflection at x = 0 Concavity: concave down for all x < 0 and concave up for all x > 0 Increasing: increasing for all real numbers D. Critical points: none Inflection points: none Concavity: concave down for all real numbers Increasing: increasing for all real numbers
Use an identity to write the expression as a single trigonometric function or as a single number.sin 22.5° cos 22.5°
A. 
B. 
C. 
D. 