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# Math-Chapter 12

### Stack #128631

Numerically switch elements in ordered pairs
analytically (alg) 1) switch x & y. 2)sovle for y in terms of x
analytically (nonalg) y=f(x)...y=f-1(x) <=> x=f(y)
b>1 exponential growth
0<b<1 exponential decay
y=b^x...x=b^y <<this epuals: y=log'b'x
what is f-1 of y=4^x? y=log'4'x OR x=4^y
log(AB)= log(A)+log(B)
log(A/B)= log(A)-log(B)
log(A^K)= Klog(A)
Base Change Formula log'b'N=log'a'N/log'a'b
Formula for dB and sound intensity problems dB=10(logi/i0) where i0=10^-12
Created by: swim4life