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Even and odd funtions

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even and odd functions
اي قصة الدالتين دول
even function: has symmetry with respect to the y-axis
يعني هي دالة ليها تماثل مع محور ص
ex) F(x)= 2x^2
طيب لو عاوز اعرف الدالة دي من خلال معادلة مش من خلال الرسم اعمل اي
اعوض عن قيمة س ب -س واشوف المعادلة هتطلع اي ولو كان
f(-x)=f(x), the function is even
ex] f(x)=-3x^6 +3
replace x with -x so we have f(-x)=-3(-x)^6 +3= -3x^6 +3
since f(x)= -3x^6 +3 and f(-x)= -3x^6 +3
so the function is even
odd functions: has symmetry with the origin
ليها تماثل حول محور الأصل
ex) f(x)= x^3
طيب لو عاوز اعرف الدالة انها كده من غير رسم اعمل اي
replace x with -x and compare the two functions
if f(-x)=-f(x)
the function is odd.
ex] f(x)= 3x^7
f(-x)= 3(-x)^7 f(-x)=-3x^7
since f(x)=3x^7 and f(-x)=-3x^7
f(-x)=-f(x) thus the function is odd
if f(x) isn't = f(-x) and isn't =-f(x)
then the function is neither even nor odd.


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- Mathematics Note on Even and odd funtions, created by abdelrahman rabie on 04/04/2021.
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- abdelrahman rabie
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