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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of HP (Hewlett-Packard) 9s, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of HP (Hewlett-Packard) 9s one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of HP (Hewlett-Packard) 9s. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
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First and foremost, an user manual of HP (Hewlett-Packard) 9s should contain:
- informations concerning technical data of HP (Hewlett-Packard) 9s
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Table of contents for the manual
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Page 1
General Operations Powe r Supply On or Off To turn the calculator on, press [ON/C]. To turn the calculator off, press [2ndF] [O FF]. Auto power- off fu nction The calculator automatically turns off if it has not been used for approxim ately 9 minutes. Pow er can be restor ed by pressing the [ON/C] key again. Mem ory contents and the c urrent m ode [...]
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Page 2
CP precis ion capability σ 6 LSL USL − CPK process capability Min(CPU, CPL) w here CPU = σ 3 x USL − C P L = σ 3 LSL x − Note: In statistics m ode, all function keys ar e available ex cept those used for base-n ca lculations. Ex. 9: Enter the fo llowing data {2, 5 , 5, 5, 5, 9, 9, and 9} and calculate Σ x, Σ x 2 , n, x , S, CP, and CP K,[...]
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Page 3
cos –1 ( 2 1 )=? rad 2 [ √ ] [ 2nd F ] [ x –1 ] [ 2ndF ] [ cos –1 ] RAD 0.79 tan –1 1 = ? grad 1 [ 2nd F ] [ tan –1 ] GRAD 50.00 Foncti ons h yperbol ique s et hyperb olique s inverse s cosh1.5+sinh1.5 = ? 1.5 [ HYP ] [ cos ] [ + ] 1 .5 [ HYP ] [ sin ] [ ENTER ] DEG 4.48 sinh –1 7 = ? 7 [ HYP ] [ 2ndF ] [ sin –1 ] DEG 2.64 tanh 1 = [...]