Given the sequence is defined by the explicit definition latex: t_n=2^n-nt n = 2 n − n, find the 5th term of the sequence. (ie latex: t_5t 5)

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

What is the missing step in this proof ?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)