Solve the problem.
-$$\text { If } f ( x ) = 7 x ^ { 3 } + 5 x ^ { 2 } - x + C \text { and } f ( 3 ) = 1$$ hat is the value of C?
A) C = 148
B) C = 238
C) C = -230
D) C = -20

Question

Quizplus · Accepted Answer

To find C, substitute x = 3 into the function and set it equal to 1:  f(3) = 7(3)^3 + 5(3)^2 - 3 + C = 1  = 189 + 45 - 3 + C = 1  = 231 + C = 1  => C = 1 - 231 = -230.

Solve the Problem If f(x)=7x3+5x2−x+C and f(3)=1\text { If } f ( x ) = 7 x ^ { 3 } + 5 x ^ { 2 } - x + C \text { and } f ( 3 ) = 1 If f(x)=7x3+5x2−x+C and f(3)=1

Solve the Problem $\text { If } f ( x ) = 7 x ^ { 3 } + 5 x ^ { 2 } - x + C \text { and } f ( 3 ) = 1$