What is the general term of (x + 2/x)^4 ?

Question

 i want to know the answer of this question immediately for the preparation of my entrance test

Answer 1

There are five terms, using values from r=0 to r=4: each one has the structure  ₅C_r•x^n-r•(2/x)^r

where the "_nC_r" is the binomial coefficient (obtainable either by using the definition or the 4-row of Pascal"s triangle).