Question

A real function f is defined by f (x ) = 2x- 5.Then the value of f (−3).

Answer 1

Hello .

Here is your answer

Solution to your problem

The real function f is defined by f(x) = 2x-5.

then the. value of

f(-3) = 2 x (-3)-5.
= (-6)-5
= (-11)

therefore,

f(-3) = (-11)

Hope it helps you .✌️

Answer 2

Value of function

$\bf\red{ f(x)\bigg |_{(x = - 3) }= - 11}$

Given:

• A real function f(x).
• $f(x) = 2x - 5$

To find:

• Find the value of f(-3).

Solution:

Concept to be used:

Put x=-3 in the function and solve.

Step 1:

Write the function.

$f(x) = 2x - 5$

put x= -3.

$f( - 3) = 2( - 3) - 5$

Step 2:

Simplify and solve.

$f( - 3) = - 6 - 5$

or

$f( - 3) = - 11$

Thus,

Value of function $\bf f(x)\bigg |_{(x = - 3) }= - 11$

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