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प्रश्न
Common difference, d = ? for the given A.P., 7, 14, 21, 28 ........
Activity :- Here t1 = 7, t2 = 14, t3 = 21, t4 = `square`
t2 − t1 = `square`
t3 – t2 = 7
t4 – t3 = `square`
Therefore, common difference d = `square`
उत्तर
Here t1 = 7, t2 = 14, t3 = 21, t4 = 28
t2 − t1 = 14 – 7 = 7
t3 – t2 = 7
t4 – t3 = 28 – 21 = 7
Therefore, common difference d = 7
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