Represent the function \displaystyle \frac{3}{(1 - 7 x)^2} as a power series
\displaystyle f(x) = \sum_{n=0}^\infty c_n x^n

c_0 =

c_1 =

c_2 =

c_3 =

c_4 =

Find the radius of convergenceR = .

Find the radius of convergence

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