Question

If domain of the function f(x)
√2021 / x2 + 2019x + 2020
is R - {a, b} , then a×b equals​

Answer 1

Answer:

ANSWER

R.E.F image

The domain of the function

f(x)=exp(

5x−3−2x

2

)

Exp ∫n is defined every where

or redouble line

then

for

5x−3−2x

2

to be value

5x−3−2x

2

≥0

−2x

2

+5x−3≥0

& x=

2x(−2)

−5±

25−4(−2)(−3)

=

−4

−5±

25−24

=

−4

−5+1

,

−4

−5−1

=

−4

−4

,

−4

−6

=1,1.5

So 5x−3−2x

2

≥0

⇒(x−1)(x−1.5)≥0

Domain =(−∞,1)∪(3/2,∞)

(1) one and

2

3

and including

in domain

solution