High School

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If f(x) = 3x2+x/x, find f(-2)

Answer :

The value of the function f(x) = (3x² + x) / x at x = -2 is -5. As x approaches -2, the numerator approaches 10 and the denominator approaches -2, resulting in the function's value converging to -5.

The given function is : f(x) = (3x² + x) / x.

In this case, when calculating f(-2), we substitute -2 for x in the given expression:

f(-2) = (3(-2)² + (-2)) / -2

= (3(4) - 2) / -2

= (12 - 2) / -2

= 10 / -2

= -5

Therefore, the value of the function f(x) at x = -2 is -5.

This outcome makes sense because as x approaches -2, the numerator (3x² + x) also approaches a value of 10, while the denominator approaches -2. So, the fraction converges to -5, which is the value of the function at x = -2.

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