S5 |
S10 |
1 |
3 |
S10 |
S20 |
A.
| B.
| C.
| D.
|
S5 |
S10 |
1 |
3 |
5a1+10d |
10a145d |
S10 |
S20 |
10a1+45d |
20a1190d |
75d |
250d |
3 |
10 |
an |
n |
x |
a(x+2) |
1 |
2 |
1 |
4 |
2an |
an+2 |
3 |
4 |
1 |
x1+a1 |
1 |
2x2+a2 |
1 |
nxn+an |
A.31 | B.32 | C.33 | D.34 |
a-b |
c-b |
A.
| B.-
| C.
| D.-
|
A.10 | B.20 | C.40 | D.2+log25 |
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