part 2) factorise 8! - 4 (7!) ; 7!/3!4 + 7!/2!5!
2007-09-27 07:38:02 · 5 answers · asked by astalavista 1 in Science & Mathematics ➔ Mathematics
part 2
8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 -
(4) 7 x 6 x 5 x 4 x 3 x 2 x 1 =
8-4 = answer is 4
7 x 6 x 5 x 4 x 3 x 2 x 1 ( 3 x 2 x 1) (4 ) +
7 x 6 x 5 x 4 x 3 x 2 x 1 (2 x 1) (5 x 4 x 3 x 2 x 1) =
2007-09-27 07:46:59 · answer #1 · answered by mm 2 · 0⤊ 1⤋
=(8!/5!)/(6!/3!) = 8!3!/(5!6!)
=11!/9!
= 7!(8-4) = 4*7!
= 7!2!3! ( 3+5) = 8*7!2!3!
2007-09-27 07:55:02 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋
1(a)
8 * 7 * 6 /6*5*4 =
[8*7*6*5*4*3*2*1/ 5*4*3*2*1][6*5*4*3*2*1/3*2*1] =
[8!/5!]/[6!/3!] =
[(8!)(3!)]/[(5!)(6!)]
b)
11* 10 =
[11!/10!]*[10!/9!] =
[(11!)(10!)]/(10!)(9!)]
2)
8! - 4(7!) =
8(7!) - 4(7!) =
7![8 - 4] =
7!(4)
b)
7!/3! 4 + 7!/2!5!
7!/4! + 7!/2!5! =
7*6*5 + 7*6/2 =
7*6[5 + 1/2] =
42[11/2] =
21*11 = 231
2007-09-27 08:02:31 · answer #3 · answered by mohanrao d 7 · 0⤊ 0⤋
1) 8x7x6 / 6x5x4 = 8!3! / 6!5!
2) 11x10 = 11!/9!
3) 8! - 4(7!) = 8(7!) - 4(7!) = 4(7!)
4) 7! / 4(3!) + 7! / 5!2! = 7x6x5 + 7x6/2 = 7x6 (5 + 1/2) = 7X6X5.5
2007-09-27 07:51:19 · answer #4 · answered by Xero Sinko 2 · 0⤊ 0⤋
8x7x6/6x5x4=8x7/5x4=(8!/6!)/(5!/3!)=8!3!/5!6!
11x10=11!/9!
8!-4x7!=7!(8-4)=4x7!
and so on
2007-09-27 07:51:43 · answer #5 · answered by Alberd 4 · 0⤊ 0⤋