Kamis, 23 Januari 2014

Persegi dalam Lingkaran

Diketahui sebuah lingkarang dengan tepat didalamnya terdapat sebuah persegi dengan panjang rusuk 14cm, berapakah luas lingkaran tersebut?

Sisa Pembagian Faktorial

Tentukanlah sisa pembagian 1! + 2! + . . . + 2014! oleh 7 !

Senin, 25 November 2013

Is This Your Card?

A magician randomly draws one card from a standard card deck. The probability that the card drawn is a heart or a diamond can be written as , where  and  are positive, coprime integers. What is the value of ?

Details and assumptions

A standard deck of cards consists of 52 cards, formed by 13 ranks (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q and K) of 4 suits (clubs, diamonds, hearts and spades).

Point of Discontinuity

f is a function defined on the positive reals such that . For what value of  is  undefined?

The Curve of "Love"

If we talk about love, we know that love is one of abstract things in this world. Like Mathematics, love just can feel with mind, heart, and sense. We know the symbol of love, isn't right? With mathematics, we can draw the symbol of love in Cartesian Coordinate. Its so amazing right? Mathematics like a magic, all things that we think can't happen, but in mathematics, it can be happen.
This is the equation of "Love" :
x⁶ + 3x⁴ y² - 3x⁴ + 3x² y⁴ - x² y³ - 6x² y² + 3x² + y⁶ - 3y⁴ + 3y² = 1
And if we draw the equation in Cartesian Coordinate (I use GeoGebra) we get:

Believe it !!! It so amazing, with Mathematics we can do anything, so please loving mathematics !!!