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Use the product rule to differentiate y=2xsinx

The product rule states that y=uv and dy/dx=(u)dv/dx + (v)du/dx. As the equation is in this form we can let u=2x and v=sinx. Therefore du/dx=2 and dv/dx=cosx. Substituting for u and v we get dy/dx=(2x)(cosx)...
GK
Answered by Georgianna K. • Maths tutor
15841 Views

How should I approach an unseen piece of text in an exam?

Firstly, read through the text carefully and try to get your bearings within it. Ask yourself some basic questions to begin: what kind of text is this? Is it prose, poetry, a newspaper article? Who is speaki...
ER
Answered by Emily R. • English tutor
2365 Views

Solve the simultaneous equations: 5x + 3y = 41 and 2x + 3y = 20 Do not use trial and error.

5x + 3y = 41 2) 2x + 3y = 20 Subtract equation 2) from equation 1) to cancel the y's (3y-3y = 0) . Next we subtract the x's (5x - 2x = 3x) and then finally we have 41 - 20 = 21. We now have that 3x = 21 ( re...
DT
Answered by David T. • Maths tutor
21099 Views

Solve the equation "x^2 + 3x - 4 = 0".

Recognise that quadratic can be factorised: (x+4)(x-1)=0 This gives the solutions x=-4 and x=1 by inspection.
ZK
Answered by Zak K. • Maths tutor
4028 Views

Qu’est-ce que tu fais pour aider l’environnement?

Moi, je fais de nombreux choses pour aider l’environnement. Premièrement, dans ma maison on recycle tout ; le papier, le verre, même les vêtements. Deuxiement, j’essaie toujours de me souvenir d’éteindre les...
DW
Answered by Denys W. • French tutor
9125 Views