Author's photo
Angelika S.
matematika

Lineárne nerovnice

Poprosím o pomoc s týmto príkladom. Ďakujem.

Attachments:
Question image
1 answer
Tomáš Č.
Tomáš Č. Contact
3x-4<=5*(x-8), urobil sa vynásobenie menovateľa aby som to mal ľachšie, 3x-5x<=-40+4, minús na xku výmena zobáka, -2x>=-36, x=>18 interval bude logicky uzavretý od 18 po nekonečno otvorený
Comments:
Andrea K.
Nemôžete iba tak prenásobiť (x-8). V prípade, že je menovateľ kladný, tak sa znamienko neotáča a počítate tak, ako ste počítal. V prípade, že je menovateľ záporný, tak sa znamienko nerovnice otočí už na začiatku máme inú nerovnicu, ktorú treba vyriešiť a samozrejme treba robiť prienik aj s podmienkami menovateľa. Pre skúšku si zvoľte napr. číslo 0 a vidíte, že aj to je riešenie.
Send your question Send your question
Study question

Ask your question right now

Add question or Search for matematika tutors
Related questions
meet'n'learn logo doučma.sk

Tutors of matematika

Are you looking for matematika tutoring? Find the right matematika tutor for online or in-person tutoring near you.

Michaela K.

Michaela K.

5

From 15 €/hr

Ali G.

Ali G.

From 13 €/hr

Simona K.

Simona K.

5

From 12 €/hr

Andrej B.

Andrej B.

From 15 €/hr

Renáta G.

Renáta G.

From 10 €/hr

Search for a tutor

We use cookies on the website

cookie

We access the information stored on your device for this website to function properly. This includes, for example, cookies or local browser cache. We use this to store the data necessary for the functioning of the website, data used for analytical purposes, or data stored by third parties.

If this information is essential for the operation of this website, we store it automatically. For everything else, we need your consent, which you can choose to give below. Your consent is valid for 12 months. Should you refuse, we will ask you for consent again in 6 months, but you are free to change your mind at any time. For more information, please see our GDPR and Terms of Use.

This data is necessary for the proper functioning of the website and cannot be deactivated. For example, it is esential for fast navigation on the website, the correct loading of images and icons, or the login functionality.
The data is used for anonymous evaluation of traffic and user behaviour. It enables us to optimise and improve content for a better user experience.
This data is stored by partner services. In particular, this is the push notification option in the browser allowing us to proactively notify you, for instance, of a new message.