Number of results: 92
(I have two questions) 1. Solve for x without a calculator: log3(x^2)=2log3(4)-4log3(5) This is what I have so far: 2log3(x)=log3(4^2)-log3(5^4) 2log3(x)=log3(16/625) ...and now I'm stuck. 2. Simplify: 2log4(9)-2log3 <--how do you simplify with different bases? Thanks!
January 28, 2010 by Moe
Math - logs
log_3(2x - 1) = 2, Find x. Here's what I've done: log_3(2x) * log_3(1) = 2 log2x/log3 * log1/log3 = 2 trial and error... log2 (2*1.4)/log3 * 0 = 2.03... x = 1.4 I think I did it wrong because anything that multiplies with 0 gives you 0...
January 24, 2009 by Anonymous
Solve for x in the following equations. (4 marks) log3(x - 5) + log3(x + 3) = 2 <--- both log3.. 3 is subscript log7x + log7(x - 1) = log72x <--- all log7.. 7 is subscript.
March 19, 2012 by james
Name: Lesson 3 Assignment.Instructions Explain the differences between solving these two equations: log3(x - 1) = 4 and log3(x - 1) = log34. I think it has to do with the formulas
February 8, 2011 by andy
Please help, I need help on these two problems. Solve the equation. log3(x − 16) = log3(9x) e^1 + ln(7) It appears on the homework that the ln(7) is written like this ^ln(7) but I am still stuck on it. Thanks!
April 22, 2013 by Karl
Find the inverse of each relation: y = (0.5)^(x+2) and y = 3log base 2 (x-3) + 2 For the first one I got y=log base 0.5 (x+2)...but the answer in the back of the textbook says that it is not x+2, but x-2. Can someone tell me why it would end up being x-2 and help me with the ...
May 6, 2007 by Raj
1) Solve for x in terms of k: log3(x) + log3(x+7) = k; 3 is the base 2) e^(x+5) = e^(x) + 6, solve for x. Please help, I have no idea how to do these and I've tried several times!
October 2, 2010 by Cornelius
1) Solve the equation exactly for x: log3 x - log3(x-3) = 2 I got 1 as an answer. Is this correct? 2) Find the cotangent of the base angle of an isosceles right triangle. sqrt3 / 2. Is this correct?
March 10, 2010 by Abbey
maths pls help
1. Solve the following simultaneous equations: log2 xy = 7 log2 (x^2/y) = 5 2. If log y x =a and log z x=b where x is not equal to 1, express the following in terms of a and b: logy (yz) Solve the following simultaneous equations: y = 2 log3 x y+1 = log3 9x Thanks! I tried to ...
November 21, 2007 by Claire
HI THE QUESTION STATES THAT ONE SHOULD CALCULATE THE LOGS WITHOUT THE USE OF A CALCULATOR...OKAY MY PROBLEM IS THIS... 2 3 2log 8 + 2log 8 what should i do? i had come to the piont of... 4 5 log 8 + log 8 But what's to do now i dont know..Think u can help?... cheers michelle ...
October 25, 2006 by TIGGER
Can you please help me with the following log. problems? thanxs! Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. 7^x = 6^(x + 7) this is how far I got: x log 7/x log 7= x+7 log 6/log 7, I am ...
October 26, 2007 by Ang
I am supposed solve these SYMBOLICALLY but i don't know how since i was never taught in school. Could someone help me solve these? 1. 7(e^(2x))^3 = 35 2. 7^(x^2-x)=7^6 3. log3(5x)=4 Thank YOU very much!!
August 24, 2010 by Jamie
simplify each expression by using properties of logarithms or definitions. check your results using the change of base formula a.) log3 27= b.) log5 (1/5)= c.) if f(x)= ln (x), find f(e^x)
March 3, 2011 by anonymous
Find the value of each of the following. Leave your answers as fractions where appropriate. Do not change bases. a) log4 (1/8) B)10^(-10log3)<---superscript in brackets c.2log3<-----subscript.9 d.log3<---subscript.3^2x
March 15, 2012 by james
Solve the following logarithmic equation. Exact words only: log 3(x+4) = 2+log3(x-20) the 3 in the part of log (3)should be lower just didn't know how to type it in here
January 1, 2013 by phyllys
solve the following logarithmic equation. Be sure to reject any value of x that is not in thedomain of the orginal logarithmic expression. Give the exact answer. log3(x+8)=4 The three actually drops down a little below the g. Can someone tell me how to do this?
October 6, 2012 by ladybug
What is the domain and range of log3 (1-x)? I will be happy to critique your thinking. To assist you, consider log (-4) log (0) log 25 Those are to the base 10, changing to another base just changes the numbers, not the function.
January 13, 2007 by emma
Algebra/can you help me
Write each expression in terms of common logarithms, and then give a calculator approximation (correct to four decimal places). log7^10= 1.183 How do you find the approximation log3^316 = 5.239 How do you find the approximation Thank you
June 2, 2014 by Mary Ann
how wod i solve the following two eqautions? either exactly or to 3 significant a)2^x = 5 b)3^x+1 = 7 i know a) is 2.32 and b) is 0.771 but i dont know how to show it out step by step in how i worked it out . can sum1 plz help me You have to use logs, and learn how to do that ...
August 14, 2007 by k
i will be greatful to you if you help in solving the below problems: 1.)Prove that log15=log5+log3 2.)Show that log10800=4log2+3log3+2log5 3.)show that log108/605=2log2+3log3-log5-2log11.
April 27, 2012 by srikar
Rewrite the following as an equivalent logarithmic equation.Do not solve. y^t = x answer logy+logt=logx-is this right also Express as an equivalent expression that is a sum of logt (3ab) the t is at the bottom of the g answer log3+loga+logb logarithms.
May 5, 2010 by dani
Let log 2 = a, log 3 = b and log 7 = c. Express the indicated logarithm in terms of a, b, and c. 1-log3 5 (3 is the subscript of the log) ans:(1-a)/b, i need someone to show me the step bcus my ans is different from the given ans. my ans=(1/a)-b.
March 28, 2013 by ifi
Evaluate the logarithmic equation for three values of x that are greater than 2, three values of x that are between 1 and 2, and at x=2. Show your work. Use the resulting ordered pairs to plot the graph. State the equation of the line asymptotic to the graph. y = log3 (x - 1)
June 15, 2010 by Bobby
Express as a logarithm of a single number or expression: 1. 5log4^p+log4^q 2. log10^x-4 log10^y 3. 4log3^A-1/2 log3^B 4. log5^M+1/4 log5^N 5. log2^M+log2^N+3 6. log5^x-log5^y+2 7. 1-3 log5^x 8. (1+log9^x)/2 I need to see all of the steps. Thanks
May 12, 2011 by Brandon
I am having trouble with this one Can someone please show me the steps, the pairs to plot and the asymptotic? Thank you in advance! Evaluate the logarithmic equation for three values of x that are greater than 2, three values of x that are between 1 and 2, and at x=2. Show ...
June 16, 2010 by Kris
I am supposed to write each logarithmic expression as a single logarithm. I have logbase3of13 + logbase3of3 and my answer is logbase3of39. Can I simplify that any further? also logbase3 of 3 is 1 1+ log3 13 is another answer, simpler, to me. oh, okay, so it would make more ...
April 12, 2007 by Gloria
1. Find the midpoint and the distance between the points (8,6) and (13, 4). 1. (4, 3), 10 units 2. 3. 4. (10, 1), 9 units 2. Find the vertex and the focus of the parabola with the equation 4y = x2 12x + 52. 1. V(6, 4), F(6, 5) 2. V(6, 4), F(7, 4) 3. V(4, 6), F(4, 7) 4. V(...
June 4, 2011 by Ben