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Questions based on Median (in Hindi)
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Introduction to median( in hindi)

Dayanand Jangir
working with world top mnc and corporate learn different techniques to teach maths with motivation and zest for selection in exam

Unacademy user
3^n-1 is the answer The same question was done in binomial theorem also Thank u for revising
Ojasv Tewari
a year ago
Why n-1? Is'nt the answer 3 to the power of n
Jessica Gulati
a year ago
Ojasv tewari When we add the three equations by putting x=1,w and w^2 then we get:- 3^n=3(a+a3+a6...........) 3 that is on RHS ,when comes in denominator becomes 3^n-1=a+a1+a2.......... :)
Jessica Gulati
a year ago
I hope above information is helpful