# helppppppppWatch

#1
The function f(x) is such that f'(x) = 9x^2 + 4x + c, where c is a particular constant.
Given that f(2)=14 and f(3)=74, find the value of f(4).
0
4 years ago
#2
(Original post by eyenarbi)
The function f(x) is such that f'(x) = 9x^2 + 4x + c, where c is a particular constant.
Given that f(2)=14 and f(3)=74, find the value of f(4).
Integrate to get an expression with two unknown constants. Use the two points given to write two equations and solve to find the constants.
0
4 years ago
#3
Agreed

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0
4 years ago
#4
(Original post by TheAlfie3000)
Agreed

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LOL.
0
#5
(Original post by BabyMaths)
Integrate to get an expression with two unknown constants. Use the two points given to write two equations and solve to find the constants.
Arghhhhhh don't get it
0
4 years ago
#6
(Original post by eyenarbi)
Arghhhhhh don't get it
I'm ready to help but you're going to have to say more than that.
0
4 years ago
#7
You have f'(x) and you need to get to f(x), which you do by integrating.

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