Maths-
General
Easy
Question
Prove the sum of cubes identity :
The correct answer is: Hence, the proof.
ANSWER:
Hint:
,where a,b,c and d are real numbers.
We are asked to prove the given equation.
Step 1 of 2:
The given equation is .The LHS and RHS are 
and 
respectively.
We have to prove they are equal. For that prove the LHS and the RHS are equal.
Step 2 of 2:
Multiply the RHS in the given equation,
Hence, the proof.
Note:
To prove an equation to be equal, we have to prove either the RHS is equal to the LHS or vice versa. The side should be selected based on the simplification process.
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After diluting salt water, the concentration of salt in the water is given by the function 
, where x is the time in hours since the dilution.
b. After how many hours will the concentration of salt in the water be ?Round to the nearest hundredth.
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a. What is the concentration of salt in the water after 4 hours?
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A Software CD can be manufactured for 
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Maths-General
