 |
Algebra problems (60..68) |  |
 |
problems 50..59
problems 70..7660.
| solve |  |
61.
A.
| find n if |  |
B.
| calculate n if |  |
62.
| calculate |  |
if | 
|
63.
2n + 2n-1 = 48
Calculate n.
64.
x3 + x2 = 392.
Calculate x.
65.
| If |  |
calculate | 
|
66.
A.
n is a positive integer.
| Prove that |  | is divisible by 7 |
B.
N is a positive integer.
| Prove that the fraction |  | is not reducable for any N |
C.
x and y are integers.
Prove that :
-
if 2x + 3y is divisible by 17 than also 9x + 5y is divisible by 17.
67.
A.
x4 + x2 = 90.
Calculate x3
B.
8n = 27.
Calculate 4n.
C.
32x+1 + 3 = 3x+2 + 3x.
Calculate x.
D.
| simlify |  |
E.
2x-3y=4
| calculate |  |
F.
| solve x op |  |
68.
A.
x=? y=?
B.
x4 + x2 = 90.
x3 = ?
C.
x=?
D.
2x = 216
3y = 216
calculate:
E.
x and y are positive integers.
x2 + 4xy - 12y2 = 148.
Calculate x2 + y2
69.
Calculate above third degree function.
