• 2022-05-26 问题

    设函数f(x)在区间&#91;-2,2&#93;上可导,且f′(x)>f(x)>0,则()。 A: f(-2)/f(-1)>1 B: f(0)/f(-1)>e C: f(1)/f(-1)<e<sup>2</sup> D: f(2)/f(-1)<e<sup>2</sup>

    设函数f(x)在区间&#91;-2,2&#93;上可导,且f′(x)>f(x)>0,则()。 A: f(-2)/f(-1)>1 B: f(0)/f(-1)>e C: f(1)/f(-1)<e<sup>2</sup> D: f(2)/f(-1)<e<sup>2</sup>

  • 2022-06-08 问题

    f(x)=xln2x在x0处可导,f'(x0)=2, 则f(x0)=( ) A: 1 B: e/2 C: 2/e D: e^2

    f(x)=xln2x在x0处可导,f'(x0)=2, 则f(x0)=( ) A: 1 B: e/2 C: 2/e D: e^2

  • 2022-05-29 问题

    ‏多面体的欧拉公式是:‎ A: V–F + E = 2 B: V–F–E = 2 C: V + F–E = 2 D: V + F–E = 1

    ‏多面体的欧拉公式是:‎ A: V–F + E = 2 B: V–F–E = 2 C: V + F–E = 2 D: V + F–E = 1

  • 2022-06-07 问题

    设a=﹣(﹣2)2,b=﹣(﹣3)3,c=﹣(﹣42),则﹣&#91;a﹣(b﹣c)&#93;= A: 15 B: 7 C: ﹣39 D: 47

    设a=﹣(﹣2)2,b=﹣(﹣3)3,c=﹣(﹣42),则﹣&#91;a﹣(b﹣c)&#93;= A: 15 B: 7 C: ﹣39 D: 47

  • 2022-06-19 问题

    f(x)=x2+bx+c,x∈R,有f(2+x)=f(2-x),则( ) A: f(1)<f(2)<f(4) B: f(2)<f(4)<f(1) C: f(4)<f(2)<f(1) D: f(2)<f(1)<f(4) E: f(1)<f(4)<f(2)

    f(x)=x2+bx+c,x∈R,有f(2+x)=f(2-x),则( ) A: f(1)<f(2)<f(4) B: f(2)<f(4)<f(1) C: f(4)<f(2)<f(1) D: f(2)<f(1)<f(4) E: f(1)<f(4)<f(2)

  • 2022-06-07 问题

    Given:11. int i = 0, j = 1;12. if ((i++ == 1)&amp;&amp; (j++ == 2)) {13. i = 42;14. }15.System.out.println("i = " + i + ", j = " + j); A: i = 1, j = 2 B: i = 1, j = 1 C: i = 42, j = 2 D: i = 42, j = 1 E: Compilation fails.

    Given:11. int i = 0, j = 1;12. if ((i++ == 1)&amp;&amp; (j++ == 2)) {13. i = 42;14. }15.System.out.println("i = " + i + ", j = " + j); A: i = 1, j = 2 B: i = 1, j = 1 C: i = 42, j = 2 D: i = 42, j = 1 E: Compilation fails.

  • 2022-06-07 问题

    设a=-(-2)2,b=-(-3)3,c=-(-42),则-&#91;a-(b-c)&#93;=(  ) A: 15 B: 7 C: -39 D: 47

    设a=-(-2)2,b=-(-3)3,c=-(-42),则-&#91;a-(b-c)&#93;=(  ) A: 15 B: 7 C: -39 D: 47

  • 2022-06-08 问题

    下列( )是日期常量。 A: “2/1/18” B: 2/1/18 C: D: 1/2/18 E: F: {2/1/18}

    下列( )是日期常量。 A: “2/1/18” B: 2/1/18 C: D: 1/2/18 E: F: {2/1/18}

  • 2022-06-08 问题

    列竖式计算.42÷七=2得÷4=47÷8=

    列竖式计算.42÷七=2得÷4=47÷8=

  • 2021-04-14 问题

    【多选题】若f 1 (t) = ɛ (-t) , f 2 (t) = e t ,则f 1 (t)* f 2 (t) = A. f 1 ꞌ (t)* f 2 (–1) (t) B. f 1 (–1) (t)* f 2 ꞌ (t) C. f 1 (t-3)* f 2 (t+3) D. f 1 (–3) (t)* f 2 ꞌꞌꞌ (t)

    【多选题】若f 1 (t) = ɛ (-t) , f 2 (t) = e t ,则f 1 (t)* f 2 (t) = A. f 1 ꞌ (t)* f 2 (–1) (t) B. f 1 (–1) (t)* f 2 ꞌ (t) C. f 1 (t-3)* f 2 (t+3) D. f 1 (–3) (t)* f 2 ꞌꞌꞌ (t)

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