Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

secondary 3 | A Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
LockB
LockB

secondary 3 chevron_right A Maths chevron_right Singapore

need help w part d and f ,, pls explain too :)

Date Posted: 3 years ago
Views: 433

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
We look for good bases to change to. Usually, the bases are prime numbers like 2, 3, 5, 7 or 11.
LockB
LockB
3 years ago
for change of base formula can use any other base number and not only ln and lg ?
Eric Nicholas K
Eric Nicholas K
3 years ago
Yup! Here, we change it to bases 2, 3 and so on since we are supposed to simplify the expressions without the usage of calculators.

Bases e and 10 (meaning, ln and lg) are specially used for calculator usage, since these numbers have their special uses.

Multiplication by other 10s only adds zeroes to the back of the old number, while e has some uses.
LockB
LockB
3 years ago
thx :)