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Lawson Webster
Mathematics
26 November, 01:52
Given f (x) = 5x-1 What is f (-2)
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Hana Dickerson
26 November, 02:01
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-11
Step-by-step explanation:
Start off with the meaning of f (x) = 5x - 1
The notation is used to tell us that when a number is put in for the x on the left, it is put in every x on the right as well. The left x comes first then what to do with it on the right gives the answer. So watch it happen.
f (-2) means that wherever you see an x on the right, put in - 2 for it.
f (-2) = 5*-2 - 1
f (-2) = - 10 - 1
f (-2) = - 11
No matter how complicated what is on the right, the rule is the same.
f (x) = x^5 - 4x^3 - x
f (-2) = (-2) ^5 - 4 * (-2) ^3 - 2 would be how you interpret that question.
f (-2) = - 32 + 32 - 2
f (-2) = - 2
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Mia Booker
26 November, 02:12
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f (2) means multiply it by 5 and then subtract 1.
--> f (x) = 5x-1
--> f (-2) = 5 (-2) - 1
--> f (2-) = - 10-1
--> f (-2) = - 11
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