Qualification > Math
IGCSE MATHS DOUBTS HERE !!!!
moar:
Can you help me with this indices question...
Find the value of x :
(2/3)^x = 81/16
Thx in advance :)
Arthur Bon Zavi:
--- Quote from: moar on October 18, 2011, 02:28:32 pm ---Can you help me with this indices question...
Find the value of x :
(2/3)^x = 81/16
Thx in advance :)
--- End quote ---
To remove the x from power, multiply both the sides by log.
(2/3)x = (81/16)
x * log (2/3) = log (81/16)
x = log (81/16) / log (2/3)
x = -4
Does this help ?
bro96:
Hi I'm having some problems revising for IGCSE Maths, can you please help me:
How do you find a matrix representing a transformation when given the start and finished result?
Ghost Of Highbury:
how do you simplify this without using a calculator
sqrt(3) + 1 - sqrt(4+sqrt(12))
Arthur Bon Zavi:
--- Quote from: Ghost Of Highbury on October 24, 2011, 10:42:02 am ---how do you simplify this without using a calculator
sqrt(3) + 1 - sqrt(4+sqrt(12))
--- End quote ---
Seems like you are taking IGCSE Mathematics again. :P ::)
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