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受欢迎的代数 >

0.1n^2+100n+8=3600000

解答

0.1 n^{2} + 100 n + 8 = 3600000

解答

n = \frac{- 1000 + 144999680}{2}, n = \frac{- 1000 - 144999680}{2}

+1

十进制

n = 5520.79064 \dots, n = - 6520.79064 \dots

求解步骤

0.1 n^{2} + 100 n + 8 = 3600000

在两边乘以

10

n^{2} + 1000 n + 80 = 36000000

将

36000000

para o lado esquerdo

n^{2} + 1000 n - 35999920 = 0

使用求根公式求解

n_{1, 2} = \frac{- 1000 \pm 100 0 ^{2} - 4 \cdot 1 \cdot ( - 35999920 )}{2 \cdot 1}

100 0^{2} - 4 \cdot 1 \cdot (- 35999920) = 144999680

n_{1, 2} = \frac{- 1000 \pm 144999680}{2 \cdot 1}

将解分隔开

n_{1} = \frac{- 1000 + 144999680}{2 \cdot 1}, n_{2} = \frac{- 1000 - 144999680}{2 \cdot 1}

n = \frac{- 1000 + 144999680}{2 \cdot 1} : \frac{- 1000 + 144999680}{2}

n = \frac{- 1000 - 144999680}{2 \cdot 1} : \frac{- 1000 - 144999680}{2}

二次方程组的解是:

n = \frac{- 1000 + 144999680}{2}, n = \frac{- 1000 - 144999680}{2}

作图

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