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Question Number 93844 by mhmd last updated on 15/May/20

l e t f (x) = \sqrt{x} a n d g (x) = \sqrt{x} f i n d t h e d o m a i n o f (f . g) (x) ?

h e l p m e s i r

Answered by M±th+et+s last updated on 15/May/20

(f . g) (x) = f (\sqrt{x}) = \sqrt{\sqrt{x}} s o d o m a i n a n d r a n g e a r e [0, \infty)

Commented by M±th+et+s last updated on 15/May/20

t h e r a n g e

w e k n o w t h a t 0 ⩽ \sqrt{x} ⩽ \infty \dots \dots . \sqrt{}

\sqrt{0} ⩽ \sqrt{\sqrt{x}} < \sqrt{\infty}

0 ⩽ f (x) < \infty