D.w to x
y'=X²+2x+9(2x-2)-(x²-2x+9)(2x+2)/(x²-2x+9)²
Y"= (x²-2x+9)²(6x²-4x+22) -(t){2(x²-2x+9)(2x+9)
Y"= 0
2x²-5x+2= 0
X= 2,1/2
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Telegram is for everyone who wants fast and reliable messaging and calls. Business users and small teams may like the large groups, usernames, desktop apps and powerful file sharing options. You can appoint admins with advanced tools to help these communities prosper in peace. Public groups can be joined by anyone and are powerful platforms for discussions and collecting feedback.In case you're more into pictures, Telegram has animated gif search, a state of the art photo editor, and an open sticker platform (find some cool stickers here or here). What's more, there is no need to worry about disk space on your device. With Telegram's cloud support and cache management options, Telegram can take up nearly zero space on your phone.
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Yes! Voice calls are currently available to users around the world.
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