Add. Maths Binomial theorem....

[shezi1995]

Please some one help me with this question:
Find the term independent of x in the expansion of (1+x+1/x^3)^7.
The expression is in the picture attachment:

 

[OakMoon!]

Take 1+x as the first expression in the binomial formula, and 1/x^3 as the second expression. For example the second term will be: 7C1(1+x)^6(1/x^3). To evaluate (1+x)^6, apply the formula once again. If you have further problem, inform me. I'll provide you with the complete solution.

Hope this helped.