self Maths Puzzle

if a^(1/a)=b^(1/b)=c^(1/c) and a^(b*c)+b^(a*c)+c^(a*b)=729 then find the value of a^(1/a)

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self Other Question

what is 87th term in the given series:
2,10,26,50
which animal has long tongue?