The initial term of a sequence is 1/(3-√7)⁴ consecutive terms of the sequence are generated by multiplying the current term by 1/(3 √7) thus the second term would be 1/((3-√7)⁴ x (3 √7)) and so forth. 1/((3-√7)⁴ x (3 √7))
identify a term of the sequence that is rational.
