How would someone write a shifted geometric sequence in the explicit formula. i believe it requires modification of f(x) = ln(x) however, i haven't been able to figure it out. for example u(n) = u(n-1)(r)-15, let us say u(1) = 28 and r = 2, how would i figure out the 56th term without a graphing calculator using the explicit formula?

Hello,

Letter c hope it

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.