HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 178
Program constants and physical constants
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hp40g+.book Page 24 Friday, December 9, 2005 1:03 AM 4. Copy the result and evaluate. Thus, substituting X for S1, it can be seen that: ∫3x2 - 5dx= - 5 x + 3 ∂--∂--X---x--3-(--3--X This result is derived from substituting X=S1 and X=0 into the original expression found in step 1. However, substituting X=0 will not always evaluate to zero and may result in an unwanted constant. ∫ To see this, consider: (x - 2)4dx= -(--x----------2----)--55 The 'extra' constant of 32/5 results from the substitution of x = 0 into (x - 2)5/5, and should be disregarded if an indefinite integral is required. Program constants and physical constants When you press , three menus of functions and constants become available: • the math functions menu (which appears by default) • the program constants menu, and • the physical constants menu. The math functions menu is described extensively earlier in this chapter. 13-24 Using mathematical functions