Grade 11IIT JEE Entrance Exam
The coefficient of x^50 in the expansion of 1+(1+x)+(1+x)²+........+(1+x)^99 is
The coefficient of x^50 in the expansion of 1+(1+x)+(1+x)²+........+(1+x)^99 is
1 Answer
Arun
Dear student
it is clewrly visible thet coefuof x^50 = 99c50 + 98c50 + 97c50 + …..........+ 50c50
nowuse upper index variable to simplify this,
Regards
Arun
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