a^99! that's mean a^1*a^2*....*a^99 or [(a^1)^2.....]^99???
The question confuse me a lot! thaks!
The question confuse me a lot! thaks!
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About factorial��
Source: Beat The GMAT — Problem Solving |
no, it's when you multiply a 99! times --> a*a*a*a*a*a*a*a*... a (total 99! times)
can be further rewritten as (a^98!)^99 OR (a^97!)^(98*99)
can be further rewritten as (a^98!)^99 OR (a^97!)^(98*99)
327356719 wrote:a^99! that's mean a^1*a^2*....*a^99 or [(a^1)^2.....]^99???
The question confuse me a lot! thaks!
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Could actually mean either way, depending on whether the '!' sign is part of the exponent or not. If the ! sign is in the exponent superscript, then Night reader's interpretation is correct: we first deal with the exponent (i.e. figure out what is 99!), then multiply a by itself that huge number of times.Night reader wrote:no, it's when you multiply a 99! times --> a*a*a*a*a*a*a*a*... a (total 99! times)
can be further rewritten as (a^98!)^99 OR (a^97!)^(98*99)327356719 wrote:a^99! that's mean a^1*a^2*....*a^99 or [(a^1)^2.....]^99???
The question confuse me a lot! thaks!
If the '!' sign is not part of the exponent, then we first figure out the power a^99, then make THAT number factorial.
