- #1
roger
- 318
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Hi
I have a basic question on calculus ...please can someone explain to me :
Let f(x) = x^2
y + delta y = f ( x + delta x )
The book says that a small increase in x will cause a small increase in y.
But if I put let's say 3 and 2 for x and dx y is 5^2 which is 25.
But this isn't the same as f(3) + f(2) which equals 13 ?
What have I done wrong ?
Also, can f ( a+b+c ) be treated as f(a) + f(b) + f(c) ?
Thanks a lot for any help
Roger
I have a basic question on calculus ...please can someone explain to me :
Let f(x) = x^2
y + delta y = f ( x + delta x )
The book says that a small increase in x will cause a small increase in y.
But if I put let's say 3 and 2 for x and dx y is 5^2 which is 25.
But this isn't the same as f(3) + f(2) which equals 13 ?
What have I done wrong ?
Also, can f ( a+b+c ) be treated as f(a) + f(b) + f(c) ?
Thanks a lot for any help
Roger