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Multiple Choice
If and are both antiderivatives of , what must be true about and ?
A
B
is a constant for all x
C
for all x
D
is a constant for all x
Verified step by step guidance
1
Step 1: Understand the concept of antiderivatives. An antiderivative of a function f(x) is a function whose derivative is f(x). For example, if F(x) is an antiderivative of f(x), then F'(x) = f(x).
Step 2: Recognize that if F(x) and G(x) are both antiderivatives of f(x), their derivatives are equal, i.e., F'(x) = G'(x) = f(x). This implies that the difference between F(x) and G(x) must be constant because the derivative of a constant is zero.
Step 3: Express the relationship mathematically. Since F'(x) = G'(x), we can write F(x) - G(x) = C, where C is a constant. This means that F(x) and G(x) differ only by a constant.
Step 4: Eliminate incorrect options. The statement 'F(x) + G(x) = f(x)' is incorrect because the sum of two antiderivatives does not equal the original function. Similarly, 'F(x) = G(x) for all x' is incorrect because F(x) and G(x) can differ by a constant.
Step 5: Conclude that the correct answer is 'F(x) - G(x) is a constant for all x,' as this is the fundamental property of antiderivatives of the same function.