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The body is the hero

Hello guys,

   I was chatting earlier today and someone told me that science must be considered the hero of our time mainly when it comes to our immune system. Thenceforth, I decided to post exactly what I have learned from the past few days and I hop

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Geometry (I)

Imagine that we have 2 parallel lines and there are 5 points on each line.

How many triangles can we make by them?



1-      100

2-      200

3-      150

4-      300

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Let's study "Mathematics" with each other! (7)


sin-1 x + cos-1 x=?


1-    π/4

2-    π

3-    π/2



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-π/2 < Ө < π/2

Sinhx= tgӨ






1-    cos Ө

2-    csc Ө

3-    sec Ө

4-    sin Ө


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Let's study "Mathematics" with each other! (6)




f(x)=  x  , for x≤1       &      x^2  ,for  x>1



What is the inverse of f(x)?


1-    x  , for x≤1       &      √x  ,for  x>1

2-    -x  , for x≤1       &      -√x  ,for  x>1

3-    1/x  , for x≤1       &      1/x^2  ,for  x>1

4-    -1/x  , for x≤

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Let's study "Mathematics" with each other! (4)


1-      If we have:


f(x)= x^2+2x



Then, how many answers can (gof)(x)=(fog)(x) have?

1-      1

2-      2

3-      3

4-      6


       *******       *******       *******       *******       *******



2-      If we have:




Then, what is

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Let's study "Mathematics" with each other! (2)

1-If we have:


[x] ≤ (x/2)


Then which one is right?


1-      {x: x>1}

2-      {x: x<1}

3-      {x: -1<x<1}

4-      {x: -2<x<0}


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2-Which one is odd?


1-      Ln {x+(1+x2)}

2-      e^sinx


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Let's study "Mathematics" with each other!

Hi dear friends!

How are you?

Are you interested in "Math"?!


Let's study it together!


Please answer these questions:


1-      If  we have:


1< (2|x|-1)/|x|+1 < 2



Which one is right?


1)      x > 1/2

2)      -2 < x < 2

3)      x < -(1/3) or x > (1/3)


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6s all around !

Hi you who is interested in mathematics ! I do love it ...So welcome to this session !Stop by to take a look at the lines below to see if you're a talented mathematician !

picture taken from hereDo not get desperate if you couldn't solve the mystery b

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Stay away from aliens??

There has been an interesting debate about our quest for extraterrestrial life forms, since Stephen Hawking, a renowned theoretical physicist, said that if we encounter aliens, they could be more interested in exploiting our natural resources than sh

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Hi everyone is some info about the stages we go through during a sleep period...hope you to enjoy it...some facts about sleeping... Complex changes take place in the brain during sleep. It is far from a simple reduction in body process activi

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the Twin Towers

September 11, 2009 passed 8 anniversary of the attack on the World Trade Center. Its construction began in 1966, and the official opening took place 7 years later. In 2001, the Twin Towers, the main buildings of the complex were destroyed in a terror

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Don't Stand So Close to Me

In a famous episode of the TV show Seinfeld, a "close talker" makes others uncomfortable by standing mere centimeters from their faces while speaking. What makes this invasion of our personal space so uncomfortable? A new study fingers the amygdala,

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