the 7th term of an AP is four times it's second term fourth term find the AP?
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The seventh term of an AP=a7 =4(a2)
The twelfth term of the AP=a12=2+3(a4)
a7=4(a2)
a+6d=4(a+d)
a+6d=4a+4d
2d=3a………………….(1)
a12=2+3(a4)
a+11d=2+3(a+3d)
a+11d=2+3a+9d
2d=2a+2………………….(2)
From (1) and (2)
3a=2a+2
a=2
d=3
Therefore, the progression is: 2,5,8……
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