The 4th term of an a.p is equal to 3 times the 1st term and the 7th term exceeds twice the 3rd term by 1 find the 1st term and the common difference
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a+3d=3(a)
2a=3d
a=3d/2 …1eq
a+6d=2(a+2d)+1
a+6d=2a+4d+1
a-2d+1=0
put value of a
3d/2-2d+1=0
-d/2=-1
=}d=2
a=3×2\2
=}a=3
a=3 & d=2
2a=3d
a=3d/2 …1eq
a+6d=2(a+2d)+1
a+6d=2a+4d+1
a-2d+1=0
put value of a
3d/2-2d+1=0
-d/2=-1
=}d=2
a=3×2\2
=}a=3
a=3 & d=2
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