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Sagot :
Answer:
127
Step-by-step explanation:
Given :
- 30x² + 7x
On differentiating,
- dy/dx = 2 * 30 * x²⁻¹ + 1 * 7 * x¹⁻¹
- dy/dx = 60x + 7
At x = 2
- 60(2) + 7
- 120 + 7
- 127
First differentiate
- d/dx(x^n)=nx^n-1
So
[tex]\\ \rm\Rrightarrow \dfrac{d}{dx}(30x^2+7x)[/tex]
[tex]\\ \rm\Rrightarrow 60x+7[/tex]
Put x=2
- 60(2)+7
- 120+7
- 127
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