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7^2+(3^15+3^20:3^5+3^10×3^5):(3^4)^4

Răspuns :

   
[tex] 7^2+\Big(3^{15}+3^{20}:3^5+3^{10}\times3^5\Big):\Big(3^4\Big)^4=\\ =7^2+\Big(3^{15}+3^{20-5}+3^{10+5}\Big):3^{4\times 4}=\\ =7^2+\Big(3^{15}+3^{15}+3^{15}\Big):3^{16}=\\ =7^2+3\times3^{15}:3^{16}=\\ =7^2+3^{15+1}:3^{16}=\\ =7^2+3^{16}:3^{16}= 7^2 +1 = 49+1 = \boxed{\bf 50}[/tex]



cand am o operație de facut la putere eu o voi nota intre aceste doua bari |..| , sa stii ca este acea operatie toată la putere


7^2+(3^15+3^20:3^5+3^10×3^5):(3^4)^4=

=7^2+ (3^15+ 3^|20-5| + 3^|10+5| ) : 3^|4×4|=

=7^2+ (3^15 + 3^15+3^15) :3^16=

=7^2+ (3^15 ×3) :3^16=

=7^2 + 3^|15+1| : 3^16=

=7^2 + 3^16 :3^16=

=7^2 + 3^|16-16| =

=7^2 + 3^0=

=7^2+ 1=

=7×7 +1 =

=49 +1

=50