展开 pi(sqrt(2)-1)

解答

展开

π (2 - 1)

2 π - π

十进制

1.30129 \dots

求解步骤

π (2 - 1)

使用分配律:

a (b - c) = ab - a c

a = π, b = 2, c = 1

= π 2 - π 1

= 2 π - 1 π

乘以:

1 π = π

= 2 π - π

e x p an d \frac{73 ( x + 7 y ) ^{2}}{50}

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