If f(x)=2x+7
find the value of f(4)+ f(-4)
Answers
Step-by-step explanation:
f=2x+7
f(4)= 2×4+7
f (4)=15
f (-4)=2×4-7
f (-4)=8-7
f (-4)= -1
f (4)+f (-4)= 15-1
f (4)+f (-4)=14
Answer: The correct answer is 14.The value of f(4)+f(-4) is 14 , if f(x)=2x+7.
Step-by-step explanation:
The given function is that f(x)=2x+7
We have to find the value of f(4)+ f(-4).
Further, we know by the definition of function.
A mathematical function from a set X to a set Y assigns exactly the same number of elements from Y to each element of X.. The sets X and Y are here collectively referred to as the function's domain and codomain, respectively.
Putting x = 4 in f(x)=2x+7
we get f(4)= 2×4+7
f (4)=15
Putting x = -4 in f(x)=2x+7
f (-4)=2×(-4)+7
f (-4) = (-8)+ 7
f (-4)= -1
To find the value of f (4)+f (-4), we will put the derived values:
⇒f (4)+f (-4)= 15+(-1)
we get the final value f(4)+f (-4)=14
Hence, the value of f(4)+f(-4) is 14 .
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