What is expand (a(r^n-1))/(r-1) ?

The solution to expand (a(r^n-1))/(r-1) is (ar^n-a)/(r-1)

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expand (a(r^n-1))/(r-1)

expand

\frac{a ( r ^{n} - 1 )}{r - 1}

\frac{a r ^{n} - a}{r - 1}

Solution steps

\frac{a ( r ^{n} - 1 )}{r - 1}

Expand

a (r^{n} - 1) : a r^{n} - a

= \frac{a r ^{n} - a}{r - 1}

(2 x y + i y)^{2}

2 + \frac{2 ( 8 + π )}{16}

\frac{3}{2 ( 3 a - 5 )}

(2 x + \frac{3}{y}) (2 x - \frac{3}{y})

x^{2} (2 cos (x) - 4 x sin (x) - x^{2} cos (x))

What is expand (a(r^n-1))/(r-1) ?
The solution to expand (a(r^n-1))/(r-1) is (ar^n-a)/(r-1)