Question

If f(x)=2x+1 then f(__)=13

Answer 1

Answer:

6

Step-by-step explanation:

Finding the required value will be same as solving the equation,

2x+1 = 13

=> 2x = 13-1 = 12

=> x = 12/2 = 6

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Answer 2

If f(x)=2x+1 then f(6)=13

Given:

f(x) = 2x + 1

To find:

If f(x)=2x+1 then f(__)=13  [ The value that should be in blank ]

Solution:

Given f(x) = 2x + 1  

to find the required value take 2x + 1 = 13

⇒ 2x + 1 = 13

⇒ 2x = 13 - 1

⇒ 2x = 12

⇒ x = 6  

Therefore for x = 6   2x + 1 = 13  

we can check it by substituting  x = 6

⇒ 2x + 1  = 2(6) + 1 = 13

Therefore, If f(x)=2x+1 then f(6)=13

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