# I tried a lot to solve this question, and every time i get 2, while the correct answer is 4, HELP to solve it?

Expanding the brackets it becomes:

The modern way of writing this is:

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Gradient is 4

Equation of the tangent is

Given:

Point 1

If

Then

The constant just 'goes away' ( cancels out - see part 1)

These days they write

So at point 1:

So by substituting for

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If some unknown point is

Gradient

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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- How do you use the limit definition to find the slope of the tangent line to the graph #f(x)=sqrt(x+2)# at x=2?

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