HP 39GS hp 39gs_user's guide_English_E_HDPMG39AE13.pdf - Page 169
Two-variable statistics, Symbolic functions, ISOLATE, LINEAR?
UPC - 808736931328
View all HP 39GS manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 169 highlights
XPON Exponent of value. XPON(value) Example XPON(123.4) returns 2 Two-variable statistics These are functions for use with two-variable statistics. See "Two-variable" on page 10-15. Symbolic functions The symbolic functions are used for symbolic manipulations of expressions. The variables can be formal or numeric, but the result is usually in symbolic form (not a number). You will find the symbols for the symbolic functions = and | (where) in the CHARS menu ( CHARS) as well as the MATH menu. = (equals) Sets an equality for an equation. This is not a logical operator and does not store values. (See "Test functions" on page 13-18.) expression1 = expression2 ISOLATE Isolates the first occurrence of variable in expression=0 and returns a new expression, where variable=newexpression. The result is a general solution that represents multiple solutions by including the (formal) variables S1 to represent any sign and n1 to represent any integer. ISOLATE(expression, variable) Examples ISOLATE(2*X+8,X) returns -4 ISOLATE(A+B*X/C,X) returns -(A*C/B) LINEAR? Tests whether expression is linear for the specified variable. Returns 0 (false) or 1 (true). LINEAR?(expression, variable) Example LINEAR?((X^2-1)/(X+1),X) returns 0 Using mathematical functions 13-17