Logarithms Flashcards
1
Q
log
A
log is the opposite of exponents. log2(128) = y → how many times do I need to multiply 2 by to get 128 → log2(128) = 2^y = 128 → 2^7 = 128
2
Q
Exponent rule
A
Log2(1024) = y → 2^y = 1024 → y 10
or log a (x)^p = P log a(X)
3
Q
multiplication rule
A
Log a (x y ) = log a (x) + log a (y) Log2(1024) = y → 2^y = 1024 → y 10
Lg(216) = lg (8x27) = lg(2^3 x 3^3) = log2 (2^3) + lg 3^3 = 3lg2 + 3 lg^3 = 3 + 3lg^3 //
4
Q
another rule
A
lg1/2 = lg1 - lg2
