話数テスト 作：豪雪地帯
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話数
1+1/2+1/4+......=Σk=0~∞{(1/2)^k}=2
1
1/1
1/1+
1/1+1/2+
1/1+1/2+1/4+
1/1+1/2+1/4+1/8+
1/1+1/2+1/4+1/8+……
1/1+1/2+1/4+1/8+……=
1/1+1/2+1/4+1/8+……=Σk=0~∞{(1/2)^k}
Σk=0~∞{(1/2)^k}
Σk=0~∞{(1/2)^k}=
Σk=0~∞{(1/2)^k}=2
2
tex変換
$
$\frac{1}{1}+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+……=\sum\limits_{k=0}^{\infty}(\frac{1}{2})^{k} =2$
$$
$$\frac{1}{1}+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+……=\sum\limits_{k=0}^{\infty}\frac{1}{2^{k}} =2$$
∫0→6 sinx/sinx+cosx dx = 3
{√{{tan^{-1}{e^{2nπi}}}^{-1}}{∫(-∞,∞)e^{-x^{2}}dx}}^{2} = 4
(x-5)(x+6)(x+5)/(x-3)(x+6)(x+5)=0
(x-5)/(x-3)=0
x=3,5
Error! : Zero Divide
x=5
5
28
1,2,4,7,14
1+2+4+7+14=28
28
7²=49