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B:G --> 9:7
Expressed as fractions of the whole group, boys are 9/16 of the group and girls are 7/16 of the group.
We can use algebra to work out the total group number. For our working, ...
This question is looking at integration by parts. Therefore, we need to split the integral into two parts.
Part A will be x3 and Part B will be ex .
Draw 2 columns putt...
Firstly, let (x-2)/((x+1)(x-1)2) = A/(x+1) + B/(x-1)+C/(x-1)2, where A,B and C are to be calculated.
Then, multiply both sides of the equation by (x+1)(x-1)2<...
The ratio given tells us that our paint mixture of 18 litres consists of 3 + 2 = 5 parts.
Each part therefore consists of 18/5 = 3.6 litre...
Every term needs to be differentiated in terms of x:
For the x3 term, differentiated it becomes 3x2 (multiply the whole term by the initial p...
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