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WAEC - Mathematics (1997 - No. 27)
The eleventh term of an AP, is 25 and its first term is -3. Find its common difference.
1
9
/
10
2
1
/
5
2
3
/
11
2
1
/
2
2
4
/
5
Penjelasan
a + 10d = 25
-3 + 10d = 25
d = 28/10 = 2
4
/
5
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