What is expand ((-1)^kk!)/(3^k(k+1)) ?

The solution to expand ((-1)^kk!)/(3^k(k+1)) is ((-1)^kk!)/(3^kk+3^k)

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expand ((-1)^kk!)/(3^k(k+1))

expand

\frac{( - 1 ) ^{k} k !}{3 ^{k} ( k + 1 )}

\frac{( - 1 ) ^{k} k !}{3 ^{k} k + 3 ^{k}}

Solution steps

\frac{( - 1 ) ^{k} k !}{3 ^{k} ( k + 1 )}

Expand

3^{k} (k + 1) : 3^{k} k + 3^{k}

= \frac{( - 1 ) ^{k} k !}{3 ^{k} k + 3 ^{k}}

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What is expand ((-1)^kk!)/(3^k(k+1)) ?
The solution to expand ((-1)^kk!)/(3^k(k+1)) is ((-1)^kk!)/(3^kk+3^k)