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using the Aplha key

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I have a TI 84 Plus Silver Edition and so does a student I am tutoring (via Zoom).

When I hit [Alpha][Y=] all I get it the normal [Y=] return. He gets a menu in which summation and log base change options appear.

Why are our calcualtors the same device but giving different outputs?

Thanks
asked Oct 6 by anonymous

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