Page 26 - More Higher algebra

Examples 5:

Finding solutions to logarithmic problems.

1.

= 2 log ( ) + 3
4
Find the value of x which gives y = 0; make x the
subject.

2 log ( ) = −3
4
Divide both sides by 2
3 3
log ( ) = − = − log (4)
4
4
2 2
This becomes,
3
−
log ( ) = log (4) 2
4
4
Remove the logs,
1
=
√4 3
Keystrokes for your fx calculator,

1as4q(x )=n
3

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