Try another version of this question Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Box 2: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Given the geometric sequence:
`9,\frac(90)(13),\frac(900)(169), \ldots `
Find an explicit formula for `a_n`:
`a_n = `
Find `a_(12): `
Be sure your variables match those in the question `9*(0.76923076923077^(n-1))`
Enter DNE for Does Not Exist, oo for Infinity 0.5021871942905