Question

find the value of k if f of a equals to 9 where f of x = 2 x square minus A + x​

Answer 1

Answer:

6

Since f(x) is continuous at x=3.

Therefore,

x→3

lim

f(x)=f(3)

x→3

lim

f(x)=k

x→3

lim

x−3

x

2

−9

=k

x→3

lim

x−3

(x+3)(x−3)

=k

x→3

lim

(x+3)=k

k=6

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