Si us plau, resoldreu q 40?

Resposta:

# (2) "" 2 ^ (1/4) (sqrt (2) + sqrt (3)) #

Explicació:

# x ^ 2 = sqrt (48) + sqrt (50) #

# => x ^ 2 = 4 sqrt (3) + 5 sqrt (2) #

# => x ^ 2 = (4 sqrt (6) + 10) / sqrt (2) #

# => x ^ 2 = (2 + sqrt (6)) ^ 2 / sqrt (2) #

# => x = (2 + sqrt (6)) / 2 ^ (1/4) #

# => x = 2 ^ (1/4) (sqrt (2) + sqrt (3)) #

Si us plau, ajuda'm amb la pregunta següent: ƒ (x) = x ^ 2 + 3x + 16 Troba: ƒ (x + h) Com? Si us plau, mostra tots els passos perquè entenc millor! Si us plau ajuda!!

F (x) = x ^ 2 + x (2h + 3) + h (h + 3) +16> "substitueix" x = x + h "a" f (x) f (color (vermell) (x + h) )) = (color (vermell) (x + h)) ^ 2 + 3 (color (vermell) (x + h)) + 16 "distribueix els factors" = x ^ 2 + 2hx + h ^ 2 + 3x + 3h +16 "l’expansió es pot deixar d’aquesta manera o simplificar-se" "factoritzant" = x ^ 2 + x (2h + 3) + h (h + 3) +16

Si us plau, resoldreu q 18?

Atès que A + B = 90 ^ @ llavors A = 90-B ^ @ rarr (tanAtanB + tanAcotB) / (sinAsecB) - (sin ^ 2B) / (cos ^ 2A) = (tanA [tanB + cotB]) / ( sinAsecB) - (sin ^ 2B) / (cos ^ 2 (90 ^ @ - B) = ((cancel (sinA) / cosA) [sinB / cosB + cosB / sinB]) / (cancel (sinA) / cosB) - (sin ^ 2B) / (sin ^ 2B) = ((1 / cosA) [(sin ^ 2B + cos ^ 2B) / (sinB * cancel (cosB))] / (1 / cancel (cosB)) - 1 = 1 / (cos (90 ^ @ - B) sinB) -1 = 1 / sin ^ 2B-1 = (1-sin ^ 2B) / sin ^ 2B = (cos ^ 2B) / (sin ^ 2B) = cot ^ 2B

Si us plau, resoldreu q 10?

La resposta és = 2 x = a / (b + c) y = b / (c + a) z = c / (a + b) Per tant, 1 / (1 + x) = 1 / (1 + a / ( b + c)) = (b + c) / (a + b + c) 1 / (1 + y) = 1 / (1 + b / (c + a)) = (c + a) / (a + b + c) 1 / (1 + z) = 1 / (1 + c / (a + b)) = (a + b) / (a + b + c) Finalment, 1 / (1 + x) +1 / (1 + i) + 1 / (1 + z) = (b + c) / (a + b + c) + (c + a) / (a + b + c) + (a + b) / ( a + b + c) = (b + c + c + a + a + b) / (a + b + c) = (2 (a + b + c)) / (a + b + c) = 2