Bài LUỸ THỪA TÌM X (Dạng: Đưa số) Bài 1: Tìm số nguyên x , biết: x 23 x 3 3x 34 x 4 x 77 x 7 x 3 3 x 5 5 x x 9 4 x x 6 x 4 x 22 x 2 x 8 x 23 x 3 x 16 x 24 x 4 x 64 x 26 x 6 x x 2 x 49 11 x x 1 10 10 10 x 10 12 x x 2 10 10 10 x 100 13 10 14 2 15 x ,5 x 2 x ,125 x 8 x ,125 x 5 x 16 17 18 19 40 x ,2 x x 1 x 3 1 x 2 x 1 1 x 8 x 1 1 x 5 x 0,025 40 1 x 1 40 40 x 40 Bài 2: Tìm số nguyên x , biết: x 1 3 x 2 x 1 x 52 x 2 x 3 x 4 610 x 10 x 6 22 x1 27 x 7 x 6 x 3 22 x 211 x 11 x 12 x 6 22 x 29 x 9 x 12 x 6 52 x 511 x 11 x 18 x 9 52 x 510 x 10 x 14 x 7 x 77 x 7 x 10 x 5 x 10 11 1111 x 11 x 12 x 6 11 2 x2 2 x 2 64 6 x x x 1 12 3 x3 3 x 3 27 3 3 x x 13 3 x 3 x 27 3 3 x x 2 x1 3 81 14 3 x 1 3 4 x x 5 x x3 4 16 15 4 x 3 2 x x 16 5 x3 125 5 x 3 3 x x 17 5 x1 5 x 1 125 3 x x x 18 6 x4 6 x 4 216 3 x x 19 6 x2 6 x 2 36 2 x x 20 4 x3 4 x 3 64 3 x x x5 3 81 21 3 x 5 3 x x Bài 3: Tìm số nguyên 4 x , biết: x x 1 1 2 2 x 5 x 5 5 6 6 x 5 x 6 x 3 x 1 0, 01 10 x x 1 1 10 10 x 2 x 8 2 10 27 2 2 x 3 Bài Tìm số nguyên x 4 x 26 x 6 x 2 4 x 212 x 12 x 10 3 9 3x 320 x 20 x 8 x 29 x 9 x 8 x 227 x 27 4 3 3 5 5 x x x 3 3 4 4 x 5 x x x 1 x 3 x 3 3 x 2 x , biết: x 3 3 2 2 x 5 x 1 10 100 x x 1 1 10 10 x 2 x 3 25 3 3 x 2 x 1 125 x 1 1 5 5 x 9 x 1 343 x 1 1 7 7 x 9 x 2 4 9 x 2 2 3 3 x 8 x 3 25 x 3 3 5 5 x 6 3 x 111 6 216 343 10 x 6 6 7 7 x 333 x 11 333 910 32 x 2 320 x 20 x 18 x 9 3 x 12 83 23 x 29 x 9 x x x 13 89 25 x 2 227 x 27 x 25 x 5 14 5 x 169 265 x 236 x 36 x 30 x 6 23 x1 322 15 23 x 1 210 3x 10 3x 9 x 3 16 x 3212 27 x 4 260 x 60 x 56 x 8 3 x 17 2713 33 x 339 x 39 x 36 x 18 6 3x 18 813 36 x 312 3x 12 3x x 19 1 x 1612 1 x 424 x 24 x 25 x 20 x 1 125 x 25 52 x 1 53 x 25 x 3x 75 x 74 x 74 Bài Tìm số nguyên x , biết: 1.4 x 84 2)4 x 324 3)8 x 1612 22 x 212 22 x 220 23 x 248 x 12 x 6 x 20 x 10 x 48 x 16 4)4 x 812 5)4 x 3240 6)8 x 329 22 x 236 x 32 x 16 22 x 2200 x 200 x 100 23 x 245 x 45 x 15 7)8 x 1699 8)8 x 3233 9)8 x 3266 23 x 2396 x 396 x 132 23 x 2165 x 165 x 55 23 x 2330 x 330 x 110 10)16 x 328 11)32 x 1610 12)16 x 6410 24 x 2 40 x 40 x 10 25 x 240 x 40 x 8 24 x 260 x 60 x 15 x x 13)10000 1000 1 1 14) 4 8 24 104 x 1072 2x x 1 1 15) 8 4 18 3x 1 1 2 2 x 18 x 9 x 72 x 18 x 1 1 16) 16 8 4x x 1 1 17) 16 8 4x 18 1 1 2 2 x 18 ktm x x 15 1 19) 32 8 x 5x 1 1 2 2 x 45 x 9 45 x 1 22) 81 27 4x 36 108 x 1 20) 9 27 4x 18 12 1 1 3 3 x 12 x 3 Bài Tim số nguyên x 4 23) 9 27 2x 18 2 2 3 3 x 18 x 9 x 16 1 18) 16 32 1 1 2 2 x 80 x 20 x 1 1 3 3 x 66 x 33 80 1 21) 9 27 2x 1 1 3 3 x 18 x 9 12 1 1 2 2 x 12 x 4 1 1 2 2 x 108 x 27 2x 22 66 x 10 4 24) 9 27 2x 2 2 3 3 x 30 x 15 30 x , biết: 1)2 x 45.46 2)2 x 46.163 3)2 x 45.162 x 210.212 x 212.212 x 210.28 x 222 x 22 x 224 x 24 x 218 x 18 4)2 x 25.26 5)2 x 44.23 6)2 x 165.323 x 211 x 11 x 28.23 x 220.215 x 211 x 11 x 235 x 35 7)2 x 325.646 8)2 x 43.84.165 9)3 x 9 6.27 5.818 x 225.236 x 26.212.220 3x 3 12.2 15.332 x 261 x 61 x 238 x 38 3x 35 x 5 10)2 x 83.8 10.83 x 29.2 30.29 x 2 12 x 12 84 x 13)2 16 x 212 212 2 x 1 x 11)2 x 47 83 214 2 x 5 14)2 x 26 26 26 x 273 38 39 15)3 43 2 x 17)3x x 98 273.812 316 39.38 3x 3 3x 3 x x 38 39 x 18) 16)3 x 214 x x 0 94 43 28 x 8 x x 47 12)2 x 2x 10 2x 20 94 273 3 83 29 x 29.220 x 229 x 29 x 32