chứng ming rằng nếu \(\frac{a}{b}\) > \(\frac{c}{d}\) (b>0,d>0) thì:\(\frac{a}{b}< \frac{a+c}{b+d}< \frac{c}{d}\)

TÌM X

\(\frac{x}{2}\)-\(\frac{1}{x}\)=\(\frac{1}{12}\)

HELP ME MAI P NỘP R

tính

\(\frac{1}{5}\)+\(\frac{1}{10}\)+\(\frac{1}{16}\)+...+\(\frac{1}{120}\)

help me

my dream house will be on the island.it surrounded by blue sea and many tall tree.it will have solar energy, a siwmming pool and a garden. in the future, my dream house will have a robot that can do every thing,a super smart tv that can talk with me and a car can fly. i love my future house very much.

số gạo nếp người đó bán là:

120 : 100 * 35 = 42( kg )

số gạo tẻ người đó bán là :

120 - 42 = 78 ( kg )

đáp số : 78 kg

Chứng minh:

\(\frac{1}{4^2}\)+ \(\frac{1}{5^2}\)+\(\frac{1}{6^2}\)+...+\(\frac{1}{64^2}\)<\(\frac{5}{16}\)

\(\frac{1}{4^2}\)Giúp mik vs!!!!!!