The number of five digit numbers that could be written using the digits 1 and 2 only
and such that each of 1 and 2 is used at
least once is

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Ответ:

keenonwhite2612

13.11.2020

Mathematics

$(4a^{4b} )^{2}$

Apply exponent rule : (a*b)^n = a^nb^n

$4^2(a ^{4b})^2$

$(a ^{4b} )^2$

Apply exponent rule :

$(a^b)^c= a ^{b*c}$

$= a ^{8b}$

= 4^2 = 16

$=\ \textgreater \ 16 a ^{8b}$

hope this helps!

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The number of five digit numbers that could be written using the digits 1 and 2 only and such that each of 1 and 2 is used atleast once is​