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受欢迎的代数 >

8=(1+r)^{12}

解答

8 = (1 + r)^{12}

解答

r = 42 - 1, r = - 42 - 1

+1

十进制

r = 0.18920 \dots, r = - 2.18920 \dots

求解步骤

8 = (1 + r)^{12}

交换两边

(1 + r)^{12} = 8

对于

(g (x))^{n} = f (a)

，n 为偶数，解为

g (x) = n f (a), - n f (a)

解

1 + r = 128 : r = 42 - 1

解

1 + r = - 128 : r = - 42 - 1

解为

r = 42 - 1, r = - 42 - 1

作图

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