Find the indicated terms in the expansion of the given binomial.

The first three terms in the expansion of

(x+1/x)^40

first term

second term

third term

5 answers

x^40 + 40 x^38 + 780 x^36
https://socratic.org/questions/how-do-you-find-the-fourth-term-of-a-b-8

as an example
an expansion of ... (a + b)^k

for the nth term
... (k)C(n-1) a^(k-n+1) b^(n-1)
Thanks
Scott How do you get 780x^36 for the 3rd term? Thx