Câu hỏi:

Gọi \(z_2, z_2\) là hai nghiệm phức của phương trình \(z^2-2z+2=0\). Giá trị của \(z_1^4+z_2^4\) là

 

A. \(0 \)

B. \(-4\)

C. \(4\)

D. \(-8\)

Câu 1:

Cho mặt cầu có diện tích bằng \(16\pi\). Thể tích khối cầu giới hạn bởi mặt cầu đó là

A. \(\frac{16\pi}{3}\)

B. \(\frac{64\pi}{3}\)

C. \(\frac{32\pi}{3}\)

D. \(\frac{128\pi}{3}\)

Câu 2:

Tập hợp tất cả tham số m để hàm số \(y=x^3+(m+1)x^2+3x+2\) đồng biến trên \(\mathbb{R}\) là

A. \([-4;2]\)

B. \((-4;2)\)

C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaaeaaaaaaaaa8 % qadaqadaqaaiabgkHiTiabg6HiLkaacUdacqGHsislcaaI0aaacaGL % OaGaayzkaaGaeyOkIG8aaeWaaeaacaaIYaGaai4oaiabgUcaRiabg6 % HiLcGaayjkaiaawMcaaaaa!435B! \left( { - \infty ; - 4} \right] \cup \left[ {2; + \infty } \right)\)

D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaaeaaaaaaaaa8 % qadaqadaqaaiabgkHiTiabg6HiLkaacUdacqGHsislcaaI0aaacaGL % OaGaayzkaaGaeyOkIG8aaeWaaeaacaaIYaGaai4oaiabgUcaRiabg6 % HiLcGaayjkaiaawMcaaaaa!435B! \left( { - \infty ; - 4} \right) \cup \left( {2; + \infty } \right)\)

Câu 3:

Với phép biến đổi \(u=\sqrt x\), tích phân \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamysaiabg2 % da9maapehabaWaaSaaaeaacaWGLbWaaWbaaSqabeaadaGcaaqaaiaa % dIhaaWqabaaaaaGcbaWaaOaaaeaacaWG4baaleqaaaaakiaadsgaca % WG4baaleaacaaIXaaabaGaaGinaaqdcqGHRiI8aaaa!40FB! \int\limits_1^4 {\frac{{{e^{\sqrt x }}}}{{\sqrt x }}dx} \) trở thành

 

A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGOmamaape % habaGaamyzamaaCaaaleqabaGaamyDaaaakiaadsgacaWG1baaleaa % caaIXaaabaGaaGinaaqdcqGHRiI8aaaa!3E8F! 2\int\limits_1^4 {{e^u}du} \)

B. \(2\int\limits_1^{16} {{e^u}du} \)

C. \(2\int\limits_1^2 {{e^u}du} \)

D. \(\frac{1}{2}\int\limits_1^2 {{e^u}du} \)

Câu 4:

trong không gian \(Oxyz\) cho hai điểm \(A(0;1;2), B(2;2;1)\). Phương trình mặt phẳng qua A và vuông góc với AB là

A. \(2x+y-z+1=0\)

B. \(2x-y+z-1=0\)

C. \(2x-y-z+3=0\)

D. \(2x+y-z-5=0\)

Câu 5:

Họ nguyên hàm của \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qaaeaada % WcaaqaaiaaigdaaeaaciGGJbGaai4BaiaacohadaahaaWcbeqaaiaa % ikdaaaGccaaIYaGaamiEaaaacaWGKbGaamiEaaWcbeqab0Gaey4kIi % paaaa!401E! \int {\frac{1}{{{{\cos }^2}2x}}dx} \)

A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaaabaGaaGOmaaaaciGG0bGaaiyyaiaac6gacaaIYaGaamiEaiab % gUcaRiaadoeaaaa!3DAE! \frac{1}{2}\tan 2x + C\)

B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaaabaGaaGOmaaaaciGG0bGaaiyyaiaac6gacaaIYaGaamiEaiab % gUcaRiaadoeaaaa!3DAE! \frac{1}{2}\cot 2x + C\)

C. \(-\frac{1}{2}\cot 2x + C\)

D. \(-\frac{1}{2}\tan 2x + C\)

Câu 6:

Cho hình lập phương \(ABCD.A'B'C'D'\). Góc giữa hai mặt phẳng \((ABCD)\) và \((A'D'CB)\) là

A. \(45^0\)

B. \(30^0\)

C. \(60^0\)

D. \(90^0\)