Determine the values of a and b for the function f(x)=ax^3 +bx^2 +3x -2 given that f(2)=10 and f'(-1)=14. Where would I start?
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Originally Posted by kmjt Determine the values of a and b for the function f(x)=ax^3 +bx^2 +3x -2 given that f(2)=10 and f'(-1)=14. Where would I start? ... do the same for ... then solve the system of equations for and
f(x)=ax^3 +bx^2 +3x -2 f'(x) = 3ax^2 +2bx +3 -2 14 = 3a(-1)^2 +2b(-1) +3 If thats what you mean. What would I do now? I'm not really sure how to isolate a or b.
Originally Posted by kmjt f(x)=ax^3 +bx^2 +3x -2 f'(x) = 3ax^2 +2bx +3 -2 14 = 3a(-1)^2 +2b(-1) +3 If thats what you mean. What would I do now? I'm not really sure how to isolate a or b. You have two equations and two variables. Solve them simultaneously. -------------------------------------------------------- -------------------------------------------------------- Now sub into
Last edited by Anonymous1; April 2nd 2010 at 07:26 PM. Reason: clarity is next to godliness.. Wait?
Got it thanks
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