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# Tutor profile: Sahar A.

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Sahar A.
Tutor for 5 years
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## Questions

### Subject:Machine Learning

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Question:

Why is naive Bayes so ‘naive’ ?

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Sahar A.

Because it assumes that all of the features in a data set are equally important and independent. But in real world scenarios these assumption are rarely true. Also it has no regularization term so it is prone to overfitting

### Subject:Calculus

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Question:

Find derivative of $$x^{2}$$

Inactive
Sahar A.

Using power rule : $$\frac{d}{dx}(x^{n})=nx^{n-1}$$ Solution: $$2x$$

### Subject:Algebra

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Question:

Simplify the expression: $$2(a -3) + 4b - 2(a -b -3) + 5$$

Inactive
Sahar A.

First Step: Open brackets and apply multiplication operation $$2a - 6 + 4b - 2a +2b +6 +5$$ Second Step: Combine $$a$$ variable and $$b$$ variable and other constants as: $$2a - 2a + 4b +2b - 6 + 6$$ Third Step: Simplify as: $$6b$$ and this is the required answer

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