The `4^(t h)`term of a G.P. is square of its second term, and the first term is `3`. Determine its `7^(t h)`term.

Explanation

`a_
4` = `a_2^2`


`a_
2` =`a_1 r^1`


`a_ 2` =`-3 times r`


`a_
4` =`-3 times r^3`


according to the question


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