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Two keys can be used to enter negative exponents on the TI-30Xa scientific
calculator; the [y^x] key or the [EE] key. The [y^x] key is used for
all exponents while the [EE] key is used for scientific notation only. The
examples below will demonstrate how to use both keys:
1) Entering
7^-2.
• Press [7] [y^x] [2] [+/-] [=]. • The calculator will display:
0.20408163.
2) 1*10^-3.
• Press [1] [EE] [3] [+/-] [=]. • The calculator will
display: 0.001
If you're asking about entering powers of ten, use the EE (enter exponent) key just above the 7. If you're asking about exponentiation, use the y^x key just above the divide.
Hi, You have a key labeled [Y to the x], use it for all the powers or roots that do not have a dedicated key or key sequence. Let the key be [^]
Ex: 13.675 to the power 1.33 is entered as 13.675 [^] (1.33) [=]. The result is 32.41778634 Ex: (-64)[^](2/3) [=] gives 16 as result. The (-) is the change sign key Ex: (2.87655)^(-6.778) is entered as 2.87655 [^] ( (-) 6.778 ) [=] 0.0007758 The (-) is the change sign (or the negative of), not the regular minus. When you have a negative exponent or a complicated exponent, it is safer to enclose the whole exponent inside parentheses.
You can download the guidebook for this calculator from TI here.
From page 16: To enter a number in scientific notation: 1) Enter up to 10 digits for the base (mantissa). If negative, press the +/- key. (The key has two curvy arrows between the + and - but I can't do that on my keyboard.) 2) Press the EE key. 3) Enter a 1 or 2-digit exponent. If negative, press +/- either before or after entering exponent.
They give the example 1.2345 +/- EE +/- 65 which would display -1.2345 -65.
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