Математический анализ Примеры

$f (x) = 8 x^{2} - 9$ , $(1, 7)$

Step 1

Evaluate $f (x) = 8 x^{2} - 9$ at $x = 1$ .

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Step 1.1

Replace the variable $x$ with $1$ in the expression.

$f (1) = 8 {(1)}^{2} - 9$

Step 1.2

Simplify the result.

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Step 1.2.1

Simplify each term.

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Step 1.2.1.1

One to any power is one.

$f (1) = 8 \cdot 1 - 9$

Step 1.2.1.2

Multiply $8$ by $1$ .

$f (1) = 8 - 9$

Step 1.2.2

Subtract $9$ from $8$ .

$f (1) = - 1$

Step 1.2.3

The final answer is $- 1$ .

$- 1$

Step 2

Since $- 1$ $\neq$ $7$ , the point is not on the graph.

The point is not on the graph

Step 3