展开 3n(n^3)

解答

展开

3 n (n^{3})

3 n^{4}

求解步骤

3 n (n^{3})

去除括号:

(a) = a

= 3 n n^{3}

使用指数法则:

a^{b} \cdot a^{c} = a^{b + c}

n n^{3} = n^{1 + 3}

= 3 n^{1 + 3}

数字相加:

1 + 3 = 4

= 3 n^{4}

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