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Which two expressions , added together , form a function with the following characteristics?

-It’s range is all real numbers
- it’s graph has exactly two x-intercepts

Which two expressions , added together , form a function with the following characteristics-example-1

1 Answer

2 votes

Answer:

Options (B) and (C)

Explanation:

We have to form a function which has following characteristics,

1). Its range is all real numbers

Which means graph of the given function starts from negative side of the y-axis (-∞) and goes towards positive direction of the y-axis (+∞).

It's a typical characteristic of odd degree polynomial/function.

2). The graph has exactly two x-intercepts.

Which means when we put f(x) = 0, we get exactly two values of x.

Therefore, function will be, f(x) = x³ + x²

Range of the function → (-∞, ∞) Or a set of all real numbers.

x-intercepts → f(x) = x³ + x² = 0

x²(x + 1) = 0

x = -1, 0

Therefore, Options (B) and (C) will be the answer.

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