SOLUTION: Evaluate log2 16 and log7 1/49

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Evaluate log2 16 and log7 1/49      Log On


   

Question 111419: Evaluate

log2 16 and log7 1/49
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
y=log[a]X if X=a^y
y=log[2]16 if 2^y=16
2^4=16
log[2]16=4
.
y=log[7]1/49 if 7^y=1/49
7^-2=1/49
log[7]1/49=-2
.
Ed