问答题

Functions
These questions will test your knowledge of operations involving functions.
Answer the following questions.

For the function f(x)=x2+x, what is the value of f(-5)

【参考答案】

To solve, substitute -5 for x in the function:
f(-5)=(-......

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First convertto its decimal equivalent, which is 0.2. Then multiply 0.25 by 0.2 to get 0.05. Another way to solve is to first convert 0.25 to its equivalent fraction, which is. When multiplying the two fractions, you first multiply the numerators, and then the denominators, giving youBecause this is equivalent to 0.05, either answer will be correct.
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