35.D

36.C     vì nếu\(\sqrt{x}=3\) thì x=9  =>\(x^2\)=\(9^2\)=81

ta có:  \(\dfrac{a}{b}=\dfrac{5}{6}\)

    =>\(\dfrac{a}{b}=\dfrac{5}{6}=\dfrac{a+5}{b+6}=\dfrac{a-5}{b-6}\) 

   =>\(\dfrac{a+5}{b+6}=\dfrac{a-5}{b-6}\)

  =>\(\dfrac{a+5}{a-5}=\dfrac{b+6}{b-6}\)

  Vậy nếu \(\dfrac{a+5}{a-5}=\dfrac{b+6}{b-6}\) thì\(\dfrac{a}{b}=\dfrac{5}{6}\).

minh lam sai

Like other boys, I love playing soccer. My dream is to have my own ball. My dad knew that so he bought me a very nice ball. I really love it. It is a real leather fruit. It is quite heavy, but when played on the pitch it will be enjoyed. Each seam is very beautiful. Dad and I tried to kick it on the field. We all recognize that. When I brought the ball to my friends to play with, everyone complimented the ball for its quality. I am so happy about that. When not in use I’ll keep my ball neatly on a shelf. Every day I train with my ball. My dream is to become a professional player so I have to try a lot. Thank you so much Dad for giving me a very meaningful gift.

20 chứ

20 công nhan mà bạn

Ta co \(\left(x-1\right)^{x+1}-\left(x-1\right)^{x+10}=0\)

tc: x^2+3x=0

=>  x(x+3)=0

=> x=0 hoặc x+3=0   =>  x=0 hoặc x=-3

mình bận rồi,xin lỗi bạn nhiều lắm

ít