Question:
The first term of an AP is 6 and 21st term is 146. Find the common difference
A6
B5
C7
D8
Answer:
C. 7
Explanation:
a=6,a+ 20d =146 6 + 20d = 146 [tn = a + (n-1)d] 20d=140 d= 140/20 = 7
Related Questions:
Question:
A6
B5
C7
D8
Answer:
a=6,a+ 20d =146 6 + 20d = 146 [tn = a + (n-1)d] 20d=140 d= 140/20 = 7
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