Solving a 'Stanford' University entrance exam | x=?

[@BobGillah]

Excellent

[@AsadInternationalAcademy]

thank you so much

[@AsadInternationalAcademy]

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[@KarlHeinzSpock]

one can expect, that a math student finds the solution by trying different numbers for a few seconds. i found the solution within 10 seconds, then i made shure, that there is only one solution, drawing into conclusion the strict monotony of x +2^x.

[@AsadInternationalAcademy]

Good job

[@AsadInternationalAcademy]

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[@geraldojunior2871]

Só em você olhar pra pergunta já sabe que x vale 3. Essa pergunta é muito óbvia .

[@AsadInternationalAcademy]

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[@AsadInternationalAcademy]

yes, obviously

[@marcoalby7499]

X = 3 infatti 2 x 2 x 2 = 8 e 8 + 3 = 11 confermato (t = 8 secondi)

[@AsadInternationalAcademy]

beautiful job, thanks

[@AsadInternationalAcademy]

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[@ananiabaleimatuku1508]

😂😂I have travelled to the moon and back, 😂😂 Any short cut method?

[@AsadInternationalAcademy]

this is easy method dear

[@AsadInternationalAcademy]

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[@wes9627]

Yes there is, by way of the Lagrangian point L1 between the earth and moon.

[@dadano48]

1 = 11 - X / 2 X till there ..good !! after is something magical !! Lol ....if you said so....

[@robertdouglasfassidjamako139]

X=3

[@AsadInternationalAcademy]

thanks

[@AsadInternationalAcademy]

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[@AsadInternationalAcademy]

yes

[@AsadInternationalAcademy]

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[@adgf1x]

x=3

[@AsadInternationalAcademy]

Good

[@AsadInternationalAcademy]

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[@tenclancrack3112]

Genial!

[@AsadInternationalAcademy]

easy

[@AsadInternationalAcademy]

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[@JohannMoser-o4z]

X=3

[@AsadInternationalAcademy]

Fantastic job

[@AsadInternationalAcademy]

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[@AlbertoDiJanni]

X=3 in tre secondi.

[@AsadInternationalAcademy]

good

[@AsadInternationalAcademy]

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[@METRO05012012]

Coloca só uma questão dessa na prova. Kkkk

[@AsadInternationalAcademy]

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[@AsadInternationalAcademy]

easy question but hard for some students

[@mircoceccarelli6689]

👍 1) f( x ) = x + 2^x f( 0 ) = 0 + 1 = 1 f( 1 ) = 1 + 2 = 3 f( 2 ) = 2 + 4 = 6 f( 3 ) = 3 + 8 = 11 x = 3 2) 8 = 2^3 < 11 < 2^4 = 16 11 = 8 + 3 = 3 + 2^3 = x + 2^x x = 3 😊👍👋

[@AsadInternationalAcademy]

Mind-blowing job, thanks

[@AsadInternationalAcademy]

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[@AlexanderSemashkevich]

x=3

[@AsadInternationalAcademy]

right

[@AsadInternationalAcademy]

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[@AlexanderSemashkevich]

x=3

[@AsadInternationalAcademy]

ok