Question

[Vũ Huyền Trang]

r)18*123+9*4567*2+5310*6 / (2+4+6+...+20+22)+48

d)71+65*4=y+140/y+260

b11:Hãy chứng tỏ rằng :

100 - {1+1/2+1/3+...+1/100} = 1/2+2/3+3/4+...+99/100

Answer 1

[Lan Hương]

\(\frac{180\times123+9\times4567\times2+5310\times6}{\left(2+4+6+...+20+22\right)+48}\)

\(=\frac{18\times123+18\times4567+5310\times6}{132}\)

\(=\frac{116280}{132}=\frac{9690}{11}\)

Answer 2

[Dương tiễn màu tím]

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