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Kreshnik
Group Title
\[\LARGE f'(x)=x^2+3x \;\; ,\;\; f(1)=5\;\;\;\;\Longrightarrow f(2)=?\]
I need some hints
 2 years ago
 2 years ago
Kreshnik Group Title
\[\LARGE f'(x)=x^2+3x \;\; ,\;\; f(1)=5\;\;\;\;\Longrightarrow f(2)=?\] I need some hints
 2 years ago
 2 years ago

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SUROJ Group TitleBest ResponseYou've already chosen the best response.3
f(x) can be obtained by integration........then use f(1) to find value of c, then find f(2)
 2 years ago

Rohangrr Group TitleBest ResponseYou've already chosen the best response.1
ya suroj ur correctt
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
\[\LARGE f(x)=\frac13 x^3 +\frac32 x^2 \;\;\;\;??\]
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
you left +C at the end
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
you need to add +C at end because it is integration
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
indefinite integration
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
ok but... I need to firnd f(2) then how??
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
on the second condition when x=1, y=5, you see , put those values and get c
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
\[\LARGE \int\limits x^2+3x \;dx = \frac13 x^3+\frac32x^2+C\]
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
put the c back on f(x) and get complete f(x) equation and then find f(2)
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
how can I know what the value of C is ??
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
I see it you told me before... let me try, I'll see what I can do :D
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
see second condition f(1) is 5 than mean when x=1 , y=5
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
see f(x) is what you get by integration
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
because you integrate f'(x)
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
did you catch it?
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
is C=19/6 ??
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
I'm still dizzy ! O_O
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
yes you got it
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
now put that C back in f(x)
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
ahh yeah... now I'll do it thank you very much ;)
 2 years ago

SUROJ Group TitleBest ResponseYou've already chosen the best response.3
no problem lol
 2 years ago

JoshDavoll Group TitleBest ResponseYou've already chosen the best response.0
\[f \left( x \right) = x ^{2} + 3x\] \[f \left( 1 \right) = 1^{2} + 3 \times 1 = 5\] \[f \left( 2 \right) = 2^{2} + 3 \times 2 = 10\] simple.
 2 years ago

JoshDavoll Group TitleBest ResponseYou've already chosen the best response.0
@kreshnik another simple way to do something.
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
@JoshDavoll WRONG... the answer IS \[\frac{71}{6}\] !! Thanks for the help !
 2 years ago

Kreshnik Group TitleBest ResponseYou've already chosen the best response.1
hahaha... obviously , you mus be 1012 years ... LOL
 2 years ago
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