## Trending News

Promoted

# ) If y = 20x^5+9x^4-3x^3-21x^2+8x+3 find an expression for dy/dx,and the gradient at x = 2?

### 2 Answers

Relevance

- Pramod KumarLv 71 month ago
y = 20x^5+9x^4-3x^3-21x^2+8x+3

dy/dx = (20*5) x^4 + (9*4) x^3 - (3*3) x^2 - (21*2) x + 8

=> dy/dx = 100 x^4 + 36 x^3 - 9 x^2 - 42 x + 8 ............ Answer

===========================

If x = 2

Slope = dy/dx = 1600 + 288 - 36 - 84 + 8 = 1776 ........... Answer

- Login to reply the answers

- Engr. RonaldLv 71 month ago
y = 20x^5+9x^4-3x^3-21x^2+8x+3

dy/dx = 100x^4 + 36x^3 - 9x^2 - 42x + 8

when x = 2

dy/dx = 100(2)^4 + 36(2)^3 - 9(2)^2 - 42(2) + 8 = 1776 Answer//

- Login to reply the answers

Still have questions? Get your answers by asking now.