верно ли тождество?

1. √x^2-6x+9=|x-3|
2. (x^2-y^2)(x+y)= (x-y) (x^2+y^2)
3. lg(2x)+lg(5y)=1+lg(xy), x>0, y >0
4. sin 4x * tg2x=4(sin^2x-sin^4x)


ответ просто напримерт: 1.да 2. нет
Please enter comments
Please enter your name.
Please enter the correct email address.
You must agree before submitting.

Answers & Comments


Copyright © 2024 SCHOLAR.TIPS - All rights reserved.