Appendix B.pdf - Cambridge University Press

708 Essential Mathematical Methods 3&4CASForexample:expand((a x ) b )gives the correct result only if a is statedto be positive.expand(ln(a*b)) does not result in the expectedln(a) + ln(b). It requires the condition a > 0orb > 0tobestated. It also works if both a and b are statedto be positive.4:zeros(This command solves an equation where one side of the equation is zero. The variable must benamed. The answer is given as a list.zeros(x 2 − 1, x)zeros(x 2 − y 2 , x)zeros(x 2 − y 2 , y)zeros(x 2 − y, y)zeros(x 2 − 4x + 8, x)zeros(x 2 − 4x + 1, x)zeros(x 2 − 4x + 4, x)5:approx(NosolutionsTwo solutionsOne solutionUsing this command is equivalent to choosing APPROXIMATE from the Exact/Approxsubmenu of the MODE menu. When in EXACT mode you can also press ≈ (GREENmode) to obtain approximations.6:comDenom(This gives an expression with common denominator and in simplified ratio form. The screensdemonstrate the use of this command.SAMPLE7:propFrac(This command changes a fractional expression to a proper fraction form.Cambridge University Press • Uncorrected Sample Pages •2008 © Evans, Lipson, Jones, Avery, TI-Nspire & Casio ClassPad material prepared in collaboration with Jan Honnens & David Hibbard