Title: Mathamatic Formulas And Additional Help. Post by: Revival Jam on June 10, 2008, 02:32:29 am Mathamatic Formulas Exponential Identities Powers x a x b = x (a + b) x a y a = (xy) a (x a) b = x (ab) x (a/b) = bth root of (x a) = ( bth (x) ) a x (-a) = 1 / x a x (a - b) = x a / x b ______________________________________________ Logarithms y = logb(x) if and only if x=b y logb(1) = 0 logb(b) = 1 logb(x*y) = logb(x) + logb(y) logb(x/y) = logb(x) - logb(y) logb(x n) = n logb(x) logb(x) = logb(c) * logc(x) = logc(x) / logc(b) ________________________________________________ Interest and Exponential Growth The Compound Interest Equation P = C (1 + r/n) nt where P = future value C = initial deposit r = interest rate (expressed as a fraction: eg. 0.06) n = # of times per year interest in compounded t = number of years invested Simplified Compound Interest Equation When interest is only compounded once per yer (n=1), the equation simplifies to: P = C (1 + r) t Continuous Compound Interest When interest is compounded continually (i.e. n --> ), the compound interest equation takes the form: P = C e rt Demonstration of Various Compounding The following table shows the final principal (P), after t = 1 year, of an account initally with C = $10000, at 6% interest rate, with the given compounding (n). As is shown, the method of compounding has little effect. n P 1 (yearly) $ 10600.00 2 (semi-anually) $ 10609.00 4 (quarterly) $ 10613.64 12 (monthly) $ 10616.78 52 (weekly) $ 10618.00 365 (daily) $ 10618.31 continuous $ 10618.37 Loan Balance Situation: A person initially borrows an amount A and in return agrees to make n repayments per year, each of an amount P. While the person is repaying the loan, interest is accumulating at an annual percentage rate of r, and this interest is compounded n times a year (along with each payment). Therefore, the person must continue paying these installments of amount P until the original amount and any accumulated interest is repayed. This equation gives the amount B that the person still needs to repay after t years. B = A (1 + r/n)nt - P (1 + r/n)nt - 1 -------------------------------------------------------------------------------- (1 + r/n) - 1 where B = balance after t years A = amount borrowed n = number of payments per year P = amount paid per payment r = annual percentage rate (APR) Multiplication Tablex 0 1 2 3 4 5 6 7 8 9 10 11 12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 2 3 4 5 6 7 8 9 10 11 12 2 0 2 4 6 8 10 12 14 16 18 20 22 24 3 0 3 6 9 12 15 18 21 24 27 30 33 36 4 0 4 8 12 16 20 24 28 32 36 40 44 48 5 0 5 10 15 20 25 30 35 40 45 50 55 60 6 0 6 12 18 24 30 36 42 48 54 60 66 72 7 0 7 14 21 28 35 42 49 56 63 70 77 84 8 0 8 16 24 32 40 48 56 64 72 80 88 96 9 0 9 18 27 36 45 54 63 72 81 90 99 108 10 0 10 20 30 40 50 60 70 80 90 100 110 120 11 0 11 22 33 44 55 66 77 88 99 110 121 132 12 0 12 24 36 48 60 72 84 96 108 120 132 144 Remembering 9's What's 9 x 7 ? Use the 9-method! Hold out all 10 fingers, and lower the 7th finger. There are 6 fingers to the left and 3 fingers on the right. The answer is 63! If there is anything else,or forumals,please PM me. Proud Sponser Of Supernovadelta. Title: Re: Mathamatic Formulas And Additional Help. Post by: Supernovadelta on June 10, 2008, 02:45:41 am In the
Code: Logarithms The logb,can also be changed in refrence to logb(p x) = n lopx (np) The formula here tells you that the addition complexcity is defined as multiplication not devision. Title: Re: Mathamatic Formulas And Additional Help. Post by: Revival Jam on June 10, 2008, 02:50:33 am In the Code: Logarithms The logb,can also be changed in refrence to logb(p x) = n lopx (np) The formula here tells you that the addition complexcity is defined as multiplication not devision. In some ways yes,and you can always change the (PX) to any variable in the equation. Title: Re: Mathamatic Formulas And Additional Help. Post by: Ghost Rider on June 10, 2008, 03:12:07 am This looks realy hard.
Title: Re: Mathamatic Formulas And Additional Help. Post by: Y8razer on June 11, 2008, 12:40:00 am Looks nice and clean,good job! ;D ;D ;D
Title: Re: Mathamatic Formulas And Additional Help. Post by: Supernovadelta on June 11, 2008, 01:59:48 am This looks realy hard. Not realy,if you know your algebra. Title: Re: Mathamatic Formulas And Additional Help. Post by: History on June 20, 2008, 08:52:10 pm This looks realy hard. Not realy,if you know your algebra. Title: Re: Mathamatic Formulas And Additional Help. Post by: Revival Jam on August 09, 2008, 12:39:23 am This looks realy hard. Not realy,if you know your algebra. Title: Re: Mathamatic Formulas And Additional Help. Post by: thepure_ofswizy on January 27, 2010, 06:01:40 pm lol whats with the multiplication table :o |