Question

Find an equation of the tangent line to the curve at the given point.

Answer 1

\[y= \sqrt{x} (9,3)\]

Answer 2

find the derivative first!
know how to ?

Answer 3

f(x)-f(a)/x-a

Answer 4

derivative of y
at point 9,3
will give you slope of tangent at that point

Answer 5

I came up with \[-\frac{ 1}{ 2 }\]

Answer 6

but that's the wrong answer

Answer 7

you mean the slope as -1/2 ?

Answer 8

i mean like y= \[-\frac{ 1 }{ 2 }\]

Answer 9

ofcourse thats not correct...the slope isn't 0


have u solved a similar question before ?

Answer 10

no

Answer 11

ok,
so you need to use the definition of derivative, right ?

"f(x)-f(a)/x-a"

Answer 12

yes thats what i should use but i don't know where to put what

Answer 13

you can solve limits question ?