maths problem

👨🏻‍🏫 學術台數學

[匿名]

2008-01-08 6:27 pm

Justify your answer
Is f(x+y)=f(x)+f(y)?

回答 (5)

用戶20237

2008-01-08 6:44 pm

✔ 最佳答案

Yes it is.
Because:
f(x+y)
=(x+y) f times

for example
2(x+y)
=x+y+x+y
=2x+2y.

You can justify your answer like that

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nga

2008-01-08 11:03 pm

係
其實你只要代d 數入去就知係定唔係
e家設
f=2
x=3
y=4
2x(3+4)=2x3+2x4
14=14
所以e條式係岩既

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[匿名]

2008-01-08 7:01 pm

NO
assume f(x)=x^2
when x=2,y=3
L.H.S=5^2
=25
R.H.S=2^2+3^2
=4+9
=13
because L.H.S is not equal to R.H.S
therefore,the answer is NO

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ChunSing

2008-01-08 6:39 pm

Yes is it.(x+y)=f(x)+f(y)

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啟謙

2008-01-08 6:34 pm

yes.f(x+y)=(f)(x)+(f)(y)

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