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| 1. |
The n term of an ap is 7-4n find common difrence |
| Answer» an = 7 - 4n {tex}\\Rightarrow{/tex}\xa0a1\xa0= 7 - 4 {tex}\\times{/tex}\xa01\xa0= 3a2 = 7 - 4 {tex}\\times{/tex} 2 = -1 and a3 = 7 - 4 {tex}\\times{/tex}\xa03 = -5{tex}\\therefore{/tex}\xa0Common difference = a2\xa0- a1 = -1 - 3 = -4. | |