100 + 98 + 96 + 94 +.....+ 2 - 97 -95
= 100 + (98 - 97) + (96-95) + ........ + (2-1)
= 100 + 1 +1 +....... + 1
= 100 +1 . 49
= 149
(100^2 + 98^2 + 96^2 + ... +4^2 + 2^2 ) - (99^2 + 97^2 + 95^2 + ... + 3^2 + 1^2 )
cho f(x) = x^99 - 2017 x^98 + 2017x^97 - 2017x^96 + ..... +-2017x^2 + 2017x - 1 Tìm f ( 2016)
bài 1: Cho A ( x ) = x99 - 100x98 + 100x97 - 100x96 +...+ 100x-1 . Tính A ( 99 )
bài 2: Cho P(x) = 100x100 + 99x99 +...+ 2x2 + x . TÍnh P(1)
Tìm x \(\frac{x+1}{99}+\frac{x+2}{98}+\frac{x+3}{97}+\frac{x+4}{96}=-4\)
Rút gọn : a) M = \(2^{100}-2^{99}+2^{98}-2^{97}+...+2^2-2\)
b) N = \(3^{100}-3^{99}+3^{98}-3^{97}+...+3^2-3+1\)
\(2^{100}-2^{99}+2^{98}-2^{97}+...+2^2-1\)
Rút gọn a) M= 2100 - 299 + 298 - 297 +.....+ 22 - 2
b) N= 3100 - 399 + 398 - 397 +.....+ 32 - 3 + 1
Cho \(A=2^{100}-2^{99}+2^{98}-2^{97}+...+2^2-2\)
Rút gọn: M=\(2^{100}-2^{99}+2^{98}-2^{97}+....+2^2-2\)
