# Tutor profile: Emin M.

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Emin M.

A graduate student in Electrical Engineering at the top university will help you with your homework or quiz preparation

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## Questions

### Subject: Pre-Calculus

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Question:

Find the inverse for the function: $$f(x) = \frac {x}{3} -5$$

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Emin M.

Answer:

$$y = \frac {x}{3} -5 => 3y=x-15 => 3y+15 = x $$ As the result, $$f^{-1} = 3y + 15$$

### Subject: Basic Math

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Question:

Round 3.86444 to the closest thousand

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Emin M.

Answer:

3.864

### Subject: Calculus

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Question:

Find the indefinite integral of $$\int {x^2 \cdot 2 ^ {x^ {3+1}}} dx $$

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Emin M.

Answer:

Use u substitution. If $$u = x^3 +1$$ and $$du = 3 \cdot x^2$$, then $$\frac {1}{3} \cdot \int 2^ u du = \frac {1}{3} \cdot \frac {2^u}{ln 2} + C= \frac {2^{x^{3+1}}} {3 \cdot ln 2} +C $$

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