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What is the coefficient of x^2 in the expansion of (5+2x)^0.5?

We the answer in question in the form A(1+B) 0.5 and we can do that by factorising out the 5. This gives 5 0.5 (1+0.4x) 0.5 . 2. Identify the formula we are going to use and put in the numbers from this equa...
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Answered by Akinmi A. • Maths tutor
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What is the trend in the first ionisation energy of the peroid 3 elements from sodium to argon.

The first ionisation energy of an element is the amount of energy required to remove the outermost electron. This increases across the peroid as there is an increase in proton number so higher nuclear charge...
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Answered by Agness J. • Chemistry tutor
3794 Views

What determines rate of reaction?

Rate of reaction is determined by the number of successful collisions between the reactants per second. A collision is successful if two particles collide with enough energy to react. This can be affected by...
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Answered by Charlie S. • Chemistry tutor
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Briefly evaluate learning theory as an explanation of attachment.

Learning theory is a credible approach to attachment as it is founded in pre-existing scientific theory, that the association between the satisfaction of needs and the person satisfying the need will lead to...
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Answered by Laura S. • Psychology tutor
33867 Views

Differentiate y=x^(-1/2)-x

The formula you are given is an equation which is written in terms of x. So we will be differentiating with respect to x. When differentiating we take the current power and place that in front of the term. T...
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Answered by Zarin T. • Maths tutor
4194 Views