I think that you multiply 2 with 4 to get 8 and then multiply 8 with 7 to get that number then add 2.75... to get the total.
Hope it helped..
Answer:
probably (-2, 4)
Step-by-step explanation:
(a) Since
and
, we have

We're given that

but we can rewrite this as

(bear in mind that we can only do this so long as <em>x</em> ≠ 0) so it follows that

(b) On its own, we may be tempted to conclude that the domain of
is simply <em>x</em> ≠ -1. But we should be more careful. The domain of a composite depends on each of the component functions involved.
is defined for all <em>x</em> - no issue here.
is defined for all <em>x</em> ≠ 0. Then
also has a domain of <em>x</em> ≠ 0.
is defined for all <em>x</em> ≠ -1, but

is undefined not only at <em>x</em> = -1, but also at <em>x</em> = 0. So the domain of
is

Approximate solutions are
X subset 2 is approximately equal to -2.72
X subset 1 is approximately equal to -0.28