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Given y= sqrt(x) + 4/sqrt(x) + 4 , find dy/dx when x=8 giving your answer in form Asqrt(2) where A is a rational number.

Read and understand the questionRe-write in easier form to be able to differentiateDifferentiate and sub in value for xSimplifyMake sure we answer the question

Answered by Corey M. • Maths tutor

6027 Views

People A and B are taking a lift of mass 500 kg which has constant acceleration and the force from the rope that pulls it is 7500 N. The scales where the people stand show a reading of 720 N and 500 N.

Question 1 : Find the acceleration of the lift.Implementing Newton's Second Law we have : F_net =Mα_lift --->T-F_A-F_B -Mg=...

Answered by Geri N. • Physics tutor

1981 Views

In a right angle triangle (where angle ABC is 90 degrees), you are given that angle /_ ACB is 14 degrees and length "AB" is 4. Find the length of "BC".

Using SOH CAH TOA, and labelling each side of the triangle, we see that we are using "TOA". We have the following: tan(14)=4/"BC". Rearranging for "BC", we get the following:...

Answered by Andreas W. • Maths tutor

2905 Views

How do I know when to use the subjunctive mood? - A Level question

One of the easiest ways to spot whether you might need the subjunctive is when you see the word 'que', as this usually comes after phrases which trigger the subjunctive.Of course, this word is used a lot ...

Answered by Emily E. • French tutor

1335 Views

Fill in the gaps with the appropriate pronoun.

Fill in the gaps with the appropriate pronoun: me / ma /de / d' / l' / l’/ une / n’/ l’ / de / mon / lui
L'asile vieillards est à Marengo, à quatre-vingts kilomètres Alger. Je p...

Answered by Léna P. • French tutor

2136 Views