13 x 27 +26 x 35 +13 x 4 - 13

=13 x 27 + 2 x 13 x 35 + 13 x 4 -13 x 1

=13x(27+(2x35) + 4 - 1)

=13x(27+70+4-1)

=13 x 100

=1300

    13x27+26x35+13x4-13

  =351   +   910 +52   -13

  =     1261       +52   -13

  =          1313       -13

   =                    1300

mọi người ơi làm câu 2 nhé

\(\text{(11x9-100+1)x(1x2x3x4x5x6x7x8x9x10) =(99-100+1)x(1x2x3x4x5x6x7x8x9x10) =0x(1x2x3x4x5x6x7x8x9x10) =0}\)

(11x9-100+1)x(1x2x3x4x...x9x10)

=( 99 - 100 +1) x1x2x3x4x...x9x10

=(99-99) x1x2x3x...x9x10

=0x1x2x3x...x9x10

=0

Chúc bạn học tốt!

\(\left(11\times9-100+1\right)\times\left(1\times2\times3\times4\times5\times6\times7\times8\times9\times10\right)\)

\(=\)\(\left(99-100+1\right)\times\left(1\times2\times3\times4\times5\times6\times7\times8\times9\times10\right)\)

\(=\)\(\left(-1+1\right)\times\left(1\times2\times3\times4\times5\times6\times7\times8\times9\times10\right)\)

\(=\)\(0\times\left(1\times2\times3\times4\times5\times6\times7\times8\times9\times10\right)\)

\(=\)\(0\)

(11*9-100=1):(1*2*3*4*5*6*7*8*9*10)=0

11 x 99 - 100 = -1 +1 = 0 . Mà 0 : cho số nào cũng bằng 0 nên kết quả là 0

i have andap is 0

94,4                    

Ta có: x=100

\(\Leftrightarrow x+1=101\)

Ta có: \(f\left(x\right)=x^{10}-101x^9+101x^8-101x^7+...+101x+2021\)

\(=x^{10}-x^9\cdot\left(x+1\right)+x^8\left(x+1\right)-x^7\left(x+1\right)+...+x\left(x+1\right)+2021\)

\(=x^{10}-x^{10}-x^9+x^9+x^8-x^8-x^7+...+x^2+x+2021\)

\(=x+2021\)

\(=100+2021=2121\)