Evaluate C(7, 7). 0 1 7?

3 Answers

• 1

• C(7, 7)= 7*6*5*4*3*2*1 / 7*6*5*4*3*2*1

  = 1

• ??(4 + 3x) dx from [ 0 to 7 ] enable 4 + 3x = t^2 , at the same time as x = 0, t = 2 and at the same time as x = 7, t = 5 3dx = 2t dt dx = (2/3)t dt now vital turns into 2/3? t^2 from [ 2 to 5 ] = (2/9) t^3 [ 2 to 5 ] = (2/9)[ 5^3 – 2^3 ] = (2/9)(117) = 26