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Surds question 3 - C1 2016 Edexcel

Answer has to be explained verbally. I can provide a full written proof.
MP
Answered by Mihir P. • Maths tutor
4379 Views

integrate ln(x) using integration by parts

xlnx - x
KB
Answered by Kofi B. • Maths tutor
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Simplify √32 + √18 giving your answer in the form of a√2.

√32 + √18 = 4√2 + 3√2 = 7√2
KS
Answered by Kavi S. • Maths tutor
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A stone, of mass m , falls vertically downwards under gravity through still water. The initial speed of the stone is u . Find an expression for v at time t .

Ma = mg - Lmv 2) dv/dt = g-Lv 3)-1/L *(ln(g -Lv)/(g - Lu)) = t 4) g - Lv/ g - Lu = e -Lt 5) Rearrange to.... v = 1/L *(g-(g - Lu) e -Lt ) Missed some steps as it was relatively long, can perform this fully i...
JW
Answered by Joseph W. • Maths tutor
4495 Views

What is the cosine rule and how do I use it?

The cosine rule, a 2 =b 2 +c 2 -2bccosA, where a, b, & c are the sides of a triangle and A is the angle opposite side a, is the general version of Pythagoras' Theorem and applies to any triangle, not jus...
MQ
Answered by Matt Q. • Maths tutor
7691 Views