Question

What is the value of function f(x) =3x -7 when x =4

Answer 1

f(4) = 5

Explanation:

Now we have to,

→ Find the required value of f(4).

The function is,

→ f(x) = 3x - 7

Then the value of f(4) will be,

→ f(x) = 3x - 7

→ f(4) = 3(4) - 7

→ f(4) = (3 × 4) - 7

→ f(4) = 12 - 7

→ [ f(4) = 5 ]

Hence, the value of f(4) is 5.

Answer 2

Given:-

• 
  `\frak{f ( x ) = 3x - 7 ....... eqⁿ}`

`\:`

• 
  `\frak{x = \bold4}`

`\:`

now , put the value of x = 4 in given eqⁿ

• 
  `\frak{f ( x ) = 3x - 7 }`

`\:`

• 
  `\frak{f ( 4 ) = 3( 4 ) - 7 }`

`\:`

• 
  `\frak{f ( 4 ) = 12 - 7}`

`\:`

• 
  `\underline{ \boxed{ \frak{ \pink{ \: f ( 4 ) = 5 \: }}}}`

`\:`

hope it helps! :)