how can i increase my mmr after these......?

thanks guys for your replies! the thing is that even though i make mistakes (big ones) it Shouldnt matter much if my team is there to cover up for me.if im solo and make mistakes,they multiply and result in me loosing.

just for instance this:http://dotabuff.com/matches/570113625/skills

look at invoker.look at him.LOOK.

is this how you play him?

look at medusa.rushes skadi.SKADI.in a not-so-good lane

MMR goes past 5k. I have a few friends past 5100. I'm not sure how high it goes.

KoDyAbAbA, here is some advice that I have for you: You seem to go similar items consistently without taking the team composition into consideration. Let's consider your first game as Invoker.

First off, you have an orchid. A single target silence and amp damage. This item is used to shut down heroes that can escape easily, giving you a chance to take advantage of their poor stats and survivability, balanced out by their escape mechanism (Which you've disabled). Heroes that this item excels against would be Anti-Mage, Storm Spirit, Faceless Void, Weaver, etc etc... I see none of those heroes. Actually, I see no real targets that need to be silenced. Orchid is also great at picking off heroes when you can initiate with burst (Like a storm spirit using orchid on a dazzle or weaver). But look at your team. I don't think you have a very good team for ganking, minus Lion. With the buff to QW Invoker, Medusa, Warlock, and even AM to some extent, I feel like you have very strong team fight and split push. I think Orchid was a poor choice. You should have gone some team fight items instead of single target items like orchid and crit.

Your second game as weaver you made a few item mistakes as well. Silencer, Void, Slardar, and Shadow Shaman can either disable for a long time, or burst you down very quickly. As a Weaver, I think you should have gotten more stat items than just a linkens. You need things to survive the burst of their team fight while silenced for your 6+ seconds. Going Daedalus was not the way to go. You can survive their burst, then turn it around and counter initiate, or even pop time lapse afterwards to get a fresh jump on the fight. I think something like a hood would have been a great mid game item instead of baby crit into daedalus.

Your third game as Invoker, again you go orchid versus a hero that is very poor against (Phantom Lancer). I think something like a Shiva's would have been great for team fight and would have drastically slowed his attack speed, which would reduce his illusion spawn and significantly lower the opposing teams DPS. I think rushing a gem on Invoker would have been a great idea as well, considering how great of a ganking composition you have. It would make PL very scared to farm when you're not on the map, and would give you a LOT of early game map control, again making PL more hesitant to farm. The only reason to get an orchid here would be to shut down WD's ult, but since you have agh's and Invoker has so many ways to deal with WD's ult, I think it's kind of a redundant item pick up.

Hopefully that helps a bit.

Also, MMR means nothing. Don't worry about it. I'm stuck at 4100, and I coach people with higher MMR than me. It's not a very good representation of your skill level since it is almost exclusively based on wins and losses. Just play to get better. ^_^

Edit: Also, I agree with ScarPe on the BKB pick up. Against silencer or bloodseeker especially as those heroes. Silence counters Weaver very hard. Also silence against an Invoker with Agh's is a very hard counter. You will get off one to two spells most likely, assuming you position well. You will get off no spells if you are positioned poorly. BKB would be an excellent pick up as well.

MMR goes past 5k. I have a few friends past 5100. I'm not sure how high it goes.

I believe there are quite a few of you who need to READ this again.
http://blog.dota2.com/2013/12/matchmaking/

Primarily SeekHeart, i've noticed that there is some kind of complaint from you about your MMR when ever i visit the forums. Stop being Delusional. You're probably the problem, you refuse help from others when they criticize how you play or probably insult them. But that may not be the case. You're below 3k MMR and you beat someone above 3k MMR. From how the system works, it seeks players +/- your rating simultaneously, what i mean by that if you are 3000 MMR. Doesn't mean you're good. If you notice from the introductino of the MMR. it doesn't mean you "enter" a new bracket. It just states where you currently are with respect to other players who play the game. The devs most likely rounded these given numbers to the nearest hundred.

Dont forget that if you played before the rating and partied with friends who are worse than you, it WILL drag your rating down. By that i mean if you win a game you will receive a minimal rating while if you lose you received a critical hit to your MMR.

It doesn't matter what your KDR is, what matters is your cohesion with 9 other players, how well are you able to adapt to every unique situation in every game.

*** It is impossible to calculate any individual actual skill rating. There too many variables to calculate.

MMR isn't a cosmetic, it's a title that each individual holds with pride. You're not stuck at 3k MMR, you belong there. No offense but i've started at 3600, dropped down to 3300 and climbed all the way up to 4000. What happened between 3600 and 3300? I was an ******* i thought i was better than everyone else and ignored any feed back i got. I ranted on a community forums where i let out my frustration and got a lot of feed back and advice, i soon realized it wasn't the people who i played with that was the problem. It was me, i had to be open for adaption and advice from players who aren't necessarily better than i am but look at certain situations differently. After i realized i was the problem, i started to improve myself and slowly climbed all the way back up to 3600 and eventually 4000.
Take a lesson SeekHeart, your bickering wont help you if you're the problem, become the problem solver! If your team sucks what can you do to help them? offer them feed back and why it "might" help the team, if they insult you well then there is nothing you can do. ( Hence the quotation on might, i say might because individuals tend to take advice a lot better ) If you're playing middle which i assume you do, then create space for your carry. Create space all you do is create space and you'll start winning more of your games.

although i agree almost 100% with your post, you give the MMR system too much credit.
why do i get points for winning a match that i played poorly against a team that were 4 most of the time becouse dazzle DC's, and was completely carried by slark? http://dotabuff.com/matches/571187823

and lose points for a game where i played a very good chaos knight game, but got outcarried by morph? http://dotabuff.com/matches/565801331

i have never received points for a lost game, but ive also never lost points for playing bad in a won game.