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Today’s Date: 3/25/ Applications of Logarithms
Antilog (Base 10) If log y = x then y is antilog of x y = antilog x y = 10 x Common log = base 10 log 6 = log 10 6 Write → Example 1) log y = y = antilog y = = 5170
Change-of-Base Formula base down low use your calculator base 10 Example 2) log button on your calculator is base 10
Change-of-Base Formula base down low Write in log form Example 2b)
T.O.O. #1 – 9 do the same way
Solve each equation using Change-of-Base Formula a) a) Calculation-ready form b) Solution to 3 significant digits b) a) b) or #11-13, 17, 19, 23 do same way
Solve each equation using Change-of-Base Formula a) a) Calculation-ready form b) Solution to 3 significant digits b) #15, 16, 22 Do same way
Solve each equation using Change-of-Base Formula a) Calculation-ready form b) Solution to 3 significant digits Take log of both sides Don’t forget ( ) Distribute Get terms with x on same side of =
Solve each equation using Change-of-Base Formula a) a) Calculation-ready form b) Solution to 3 significant digits b) Factor out x or Solve for x Put in calc with ( ) around denom ( )
Homework #1012 Finish 10.6 Worksheet #20, 21, 25 use change of base & #25 THINK!
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Copyright © 2013, 2009, 2005 Pearson Education, Inc. Section 8.4 Quadratic Formula.
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Copyright © 2013, 2009, 2005 Pearson Education, Inc. Section 5.3 Factoring Polynomials.
Do Now 4/15/10 Take out HW from yesterday. Practice worksheet 10.2 form B odds Practice worksheet 10.2 form B odds Copy HW in your planner. Text p.
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EXAMPLE 1 Write an equation of a line from a graph SOLUTION m 4 – (– 2) 0 – 3 = 6 – 3 = = – 2 STEP 2 Find the y -intercept. The line intersects the y -axis.
1 Section 2.2 introduction an exploration into: Equations with Algebra Tiles Section 2.2 introduction an exploration into: Equations with Algebra Tiles.
Like Terms, I Add Them Adding Polynomials. Like terms are terms that contain the same variables, with corresponding variables having the same power. Example:
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Do Now 10/30/09 Copy HW in your planner. Copy HW in your planner. –Text p. 134, #12-28 evens & #34 & #36 Did you turn in POTW#8?
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