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Given the geometric sequence:
`7,\frac(4)(1),\frac(16)(7), \ldots `
Find an explicit formula for `a_n`:
`a_n = `
Find `a_(12): `
Find an explicit formula for `a_n`:
`a_n = `
Find `a_(12): `
Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question
Box 2: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity