5 (2020) Junior Problems j 21
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M ATEMATIKAFLY 5 (2020) Junior Problems J 21. Which number is larger: √ √
√ √
√
J 22. Find all the real values of which satisfy
( √ )
( )
Proposed by Dilshodbek Shodiyev, Fergana, Uzbekistan J 23. Prove that ( )( )( ) for all real numbers Proposed by Hung Nguyen, Vietnam J 24. Is there a polynomial ( ) with integer coefficients such that ( ) ( ) and ( ) ? Proposed by Elif Nur Yerlikaya, Bursa, Turkey J 25. Solve the system of equations {
in real numbers Proposed by Umidjon Rakhmonov, Kashkadarya, Uzbekistan M ATEMATIKAFLY 5 (2020)
) Find ( ) ( ).
Proposed by Wildan Bagus Wicaksono, Singapore
S 22. Let be pairwise distinct numbers, different from zero and such that Evaluate (
) (
) Proposed by George Theodoropoulos, Patras, Greece S 23. Solve the equation
in natural numbers Proposed by Turan Bey
∫ (
)
( √
))
Proposed by Sladjan Stankovic S 25. Prove that (
) (
) (
)
( ) Proposed by Dilshodbek Shodiyev, Fergana, Uzbekistan M ATEMATIKAFLY 5 (2020) Undergraduate Problems U 21. Evaluate
∑
( )
Proposed by George Theodoropoulos, Patras, Greece
+ * + are defined in the following way:
√
√
√
for all ( ) Prove that
for all Proposed by Vladimir Morozov, Russia U 23. Let
(
) then prove that .
prove the following for
( ))
(
( ))
( ) ( )
U 25. Evaluate
(
∫ (
( ))
Proposed by Ruben Sancho-Portoles, Valencia, Spain Download 297.23 Kb. Do'stlaringiz bilan baham: |
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