A) 125
B) 120
C) 100
D) 24
E) 6
Correct Answer: B
Solution :
Given, \[{{a}_{n}}=n{{a}_{n-1}}\] For \[n=2\] \[{{a}_{2}}=2{{a}_{1}}=2\] (\[\because \]\[{{a}_{1}}=1\]given) \[{{a}_{3}}=3{{a}_{2}}=3(2)=6\] \[{{a}_{4}}=4({{a}_{3}})=4(6)=24\] \[\therefore \] \[{{a}_{5}}=5({{a}_{4}})=5(4)=120\]You need to login to perform this action.
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