Tuesday, July 31, 2018

Addition, Subtraction, Multiplication, Division of Functions

Addition, Subtraction, Multiplication, Division of Functions

Addition, Subtraction, Multiplication, Division of Functions
Tuesday, July 31, 2018
 Friends iss article mein aaj hum seekhenge do(two) functions ko kaise add karte hain, do(two) functions ko kaise subtract karte hain, do(two) functions ko kaise multiply karte hain, kisi scalar (ek real number) ki multiply kisi function se kaise karte hain, do(two) functions ko kaise divide karte hain etc.

Friends main aapko recommend karoonga ki pehle aap function se related mere previous articles ko padhiye kyuki ye waala article aapko tab hi sahi se samajh mein aayega jab aap fuctions se achchhi tarah se waakif (वाकिफ़) ho. Unn articles ko padhne ke liye inn blue links par click kijiye >>>




Chaliye ab point par aate hain.

Let's Begin... 
graph of function

Addition of Two Real Functions 


Maan lijiye f : X → R,  f(x) aur g : X → R,  g(x) do(two) real functions hain aur X ⊂ R. Tab
(f + g) : X → R ko hum define karte hain (f + g)(x) = f(x) + g(x), for all x ∈ X.

Matlab, do(two) functions ka addition bhi ek function hota hai. Chaliye main isko detail mein batata hoon. Maan lijiye do(two) function f : X → R,  f(x) aur : X → R,  g(x) hain jinke domain same hain aur domain ⊂ R. Maan lijiye ki function f : X → R ka rule f(x) hai aur function g : X → R ka rule g(x) hai. Ab inn dono functions ko agar add kiya jaaye to inke addition ko (f + g) : X → R se show karte hain aur iska rule dono functions, f : X → R aur g : X → R ke rules ko add karke aata hai matlab (f + g)(x) = f(x) + g(x).

Example ke liye aan lijiye f : N → R,  f(x) = x2 aur g : N → R,  g(x) = 2x + 1 tab (f + g) : N → R aur (f + g)(x) = f(x) + g(x)
                      = (x2) + (2x +1)
                      = x2 + 2x + 1

Subtraction of Two Real Functions 


Maan lijiye f : X → R,  f(x) aur g : X → R,  g(x) do(two) real functions hain aur X ⊂ R. Tab
(f - g) : X → R ko hum define karte hain (f - g)(x) = f(x) - g(x), for all x ∈ X.

Matlab, do(two) functions ka subtraction bhi ek function hota hai. Chaliye main isko detail mein batata hoon. Maan lijiye do(two) function f : X → R,  f(x) aur : X → R,  g(x) hain jinke domain same hain aur domain ⊂ R. Maan lijiye ki function f : X → R ka rule f(x) hai aur function
g : X → R ka rule g(x) hai. Ab inn dono functions ko agar add kiya jaaye to inke subtraction ko
(f + g) : X → R se show karte hain aur iska rule dono functions, f : X → R aur g : X → R ke rules ko subtract karke aata hai matlab (f - g)(x) = f(x) - g(x).

Example ke liye aan lijiye f : N → R,  f(x) = x2 aur g : N → R,  g(x) = 2x + 1 tab
(f - g) : N → R aur
(f - g)(x) = f(x) - g(x)
               = (x2) - (2x +1)
               = x2 - 2x - 1

Multiplication of a Real Functions by a Scalar


Maan lijiye f : X → R,  f(x) ek real function hai aur X ⊂ R and maan lijiye ki α ek scalar (matlab koi real number) hai . Tab αf : X → R ko hum define karte hain (αf)(x) = αf(x) , for all x ∈ X.

Matlab, ek functions ka kisi scalar se product (scalar product) bhi ek function hota hai. Chaliye main isko detail mein batata hoon. Maan lijiye ek function f : X → R,  f(x) aur ek scalar α hai. Maan lijiye ki function f : X → R ka rule f(x) hai. Ab iss function ko aur scalar ko agar multiply kiya jaaye to inke multiplication (ya product) ko αf : X → R se show karte hain aur iska rule function,
f : X → R ke rule ko uss scalar se multiply karke aata hai matlab (αf)(x) = αf(x).

Example ke liye aan lijiye f : N → R,  f(x) = x2 aur α = 4 tab αf : N → R aur
(αf)(x) = αf(x)
            = 4(x2)
            = 4x2


Multiplication of Two Real Functions 


Maan lijiye f : X → R,  f(x) aur g : X → R,  g(x) do(two) real functions hain aur X ⊂ R. Tab
fg : X → R ko hum define karte hain (fg)(x) = f(x) . g(x), for all x ∈ X.

Matlab, do(two) functions ka multiplication bhi ek function hota hai. Chaliye main isko detail mein batata hoon. Maan lijiye do(two) function f : X → R,  f(x) aur : X → R,  g(x) hain jinke domain same hain aur domain ⊂ R. Maan lijiye ki function f : X → R ka rule f(x) hai aur function
g : X → R ka rule g(x) hai. Ab inn dono functions ko agar multiply kiya jaaye to inke multiplication ko fg : X → R se show karte hain aur iska rule dono functions, f : X → R aur g : X → R ke rules ko multiply karke aata hai matlab (fg)(x) = f(x) . g(x).

Example ke liye aan lijiye f : N → R,  f(x) = x2 aur g : N → R,  g(x) = 2x + 1 tab fg : N → R aur
(fg)(x) = f(x) . g(x)
            = (x2) . (2x +1)
            = 2x3 + x2

Division(Quotient) of Two Real Functions 


Maan lijiye f : X → R,  f(x) aur g : X → R,  g(x) do(two) real functions hain aur X ⊂ R. Tab
(f/g) : X → R ko hum define karte hain (f/g)(x) = f(x) / g(x), for all x ∈ X and g(x) ≠ 0.

Matlab, do(two) functions ka division bhi ek function hota hai. Chaliye main isko detail mein batata hoon. Maan lijiye do(two) function f : X → R,  f(x) aur : X → R,  g(x) hain jinke domain same hain aur domain ⊂ R. Maan lijiye ki function f : X → R ka rule f(x) hai aur function
g : X → R ka rule g(x) hai. Ab inn dono functions ko agar divide kiya jaaye to inke division ko
(f/g) : X → R se show karte hain aur iska rule dono functions, f : X → R aur g : X → R ke rules ko divide karke aata hai matlab (f/g)(x) = f(x) / g(x) aur g(x), 0 nahi hona chahiye.

Example ke liye aan lijiye f : N → R,  f(x) = x2 aur g : N → R,  g(x) = 2x + 1 tab (f/g) : N → R aur
(f/g)(x) = f(x) / g(x)
            = (x2) / (2x +1) , x ≠ -1/2
         

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Addition, Subtraction, Multiplication, Division of Functions
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