Question

The weight of a bacterium is defined by multiplying the functions of f(x) and g(x). Given f(x) = 3x2 + 2x and g(x) = 5x. Which of the following represents the weight of the bacterium?3x2 + 7x15x3 + 10x23x2 – 3x15x2 + 10x

Answer 1

The Solution:

Given:

`\begin{gathered} f\mleft(x\mright)=3x^2+2x \\ \\ g\mleft(x\mright)=5x \end{gathered}`

Required:

Find the weight of the bacterium if the weight is the product of f(x) and g(x).

`Weight=f(x)* g(x)`
`=(3x^2+2x)(5x)=15x^3+10x^2`

Answer: [option B]

`15x^3+10x^2`