The mathematical expression 9 € t means:
9 union t
9 intersection t
09 is an element of t
9 is not an element of t

09 is an element of T

Step-by-step explanation:

Given:

9 ∈ T

We need to find the Mathematical expression for  9 ∈ T.

Now we know that,

∈ is a Latin letter which is used in set membership and is denoted by "is an element of".

Hence from above we can say that,

9 ∈ T means 9 is an element of T.

step-by-step explanation:

what does 'mandy have ben 780 bottle caps. ' mean?

asnwer is (g o h o f)(x) = 2x - 6/x + 7

step-by-step explanation:

given,

f(x) = x - 3/x

g(x) = x + 3

h(x) = 2x + 1

we need to find : (g o h o f)(x)

we can write (g o h o f)(x) = g[ h{ f(x) } ]

so first we find h{f(x)}

h{f(x)} = f(x) + 3 = (x - 3/x) + 3

h{f(x)} = x - 3/x + 3

now we find g[ h{ f(x) } ].

g[ h{ f(x) } ] = g(x - 3/x + 3)       {plug h{f(x)} = x - 3/x + 3 in g[h{f(x)}] }

g(x - 3/x + 3) = 2 (x - 3/x + 3) + 1

                    = 2x - 6/x + 6 + 1

                    = 2x - 6/x + 7

hence we get (g o h o f)(x) = 2x - 6/x + 7