1.
Solving unknown n2. [BINOMIAL THEOREM] n Choose r
summary of concept3. [BINOMIAL THEOREM] n Choose r
ratio of two coefficient4. [BINOMIAL THEOREM] n Choose r
expand and compare5. [BINOMIAL THEOREM] n Choose r
non-zero terms6. [BINOMIAL THEOREM] n Choose r
ratio of two coefficient7. [BINOMIAL THEOREM] n Choose r
expand and compare8. [BINOMIAL THEOREM] n Choose r
expand and compare