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Dayanand Jangir

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

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Jessica Gulati

a year ago

3^n-1 is the answer
The same question was done in binomial theorem also
Thank u for revising

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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