1)tim x bit a)(1/2-1/3).6^x+6^x+2=6^15+6^18

b)3^x+3^x+2=2430

c)(2x-15)^5=(2x-15)^3

2) so saanh a)2^11 va 5^35

b)2^31 va 3^21

c)2^15 va 27^5.49^8 d)21^15 va 27^5.49^8

1)rut gon

a)(-48)³:16³

b)\(\left(\frac{9}{10}\right)^6:\left(\frac{17}{-20}\right)^6\)

c)\(\left(\frac{-13}{8}\right)^3:\left(\frac{-32}{13}\right)^4\)

II) Use the words given in brackets to form a word that fits in the space

1) ......is a person who is employed to collect and deliver lletters, ect... (mail)

viết lại câu sao cho nghĩa không đổi:

a)these are out pictures.=>these picture ......

b)it's Julia's thirteenth birthday next friday=>Julia......

c)is your motorbike back ,peter?=>is the .......

d)that is not his invention.=>that is not his invention.......

e)they predict a 10%car price increase=>they predict that........

Tìm x, biết:

b)3/x+4/-/2x+1/-5/x+3/+/x-9/=5