Cpt solution

i have done B.com with 69 % . it is necessary for me to clear CPT exam . bkz i want to get benifit of

B.Com . If it is possible  pls tell me in this way i am help less .

Thanks

Take 243 common in all terms..

243^(1+1/6+1/36.....infinite)

now the power is in GP..infinite series..sum it up..formula is a/(1-r) where a= 1, r= 1/6

243^ [1/(1-1/6)]

243^(6/5)

729