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What is the sum of the first 100 numbers of the following sequence- 4,12,36, 108, .........

This question is about geometric sequences. The first step in solving this question is identifying that each term is multiplied by 3 to get to the next term.Therefore since the formula for finding the sum...

Answered by Harry G. • Maths tutor

2791 Views

solve the simultaneous equation 2y + x = 8 and 1 + y = 2x

The aim of the question is to work out the values for x and y in order to make both equation correct. Therefore the best approach is to try to isolate one of the letters first. step 1. rearrange both equa...

Answered by Dina E. • Maths tutor

4147 Views

Evaluate Portman’s use of harmony in ‘Six Years Later’ in The Duchess with particular reference to the changing circumstances of the heroin. Relate your discussion to other relevant works. These may include set works, wider listening or other.

Given that the music is supposed to set the scene of a classical period, it is unsurprising that Portman uses an oom-cha-cha bass accompaniment in ‘Six Years Later’, a typical characteristic of the waltz ...

Answered by David S. • Music tutor

3209 Views

Discuss how the graph of orbital velocities in rotational galaxies against distance from the galactic centre implies the existence of dark matter.

Within the central swell of the galaxy, we can see that the orbital velocity increases almost linearly with distance, which corresponds with the formula for orbital velocity (namely that v=sqrt(GM/r)), as...

Answered by Jack T. • Physics tutor

1355 Views

How do I make sure that I do not run out of time in the essay questions of the exam?

Timing in the History A Level is one of the biggest challenges encountered by most people who are preparing for the exam: it's very common for students to worry about running out of time, or not writing e...

Answered by Alex S. • History tutor

2192 Views