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Chapter 4: Q. 1 (page 209)

Find $f (- 1)$ if,
$f (x) = 2 x^{2} - x$

Short Answer

Expert verified

The value of $f (- 1)$ is $3$ .

Step by step solution

01

Step 1. Given information.

The given function is,

$f (x) = 2 x^{2} - x$ .

02

Step 2. Solving the function.

On substituting $x = - 1$ in the given function we get,

$f (- 1) = 2 {(- 1)}^{2} - (- 1) = 2 (1) + 1 = 2 + 1 = 3$

Therefore the value,

$f (- 1) = 3$ .

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Most popular questions from this chapter

Find a rational function that might have the given graph.

In Problems 39–56, find the real zeros of f. Use the real zeros to factor f.

$f (x) = 4 x^{4} + 7 x^{2} - 2$

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$f (x) = x^{4} - x^{3} - 6 x^{2} + 4 x + 8$ .

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Part (b): Using your graphing utility, graph $C = C (t)$ .

Part (c): Determine the time at which the concentration is highest.

See all solutions

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