In an AP 2nd term is 7 &5th term us 19 find AP
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a₂=a+d
7=a+d...............(1)
a₇=6a+d so
19=6a+d.................(2)
by subtracting (1)and(2)
6a+d=19
- a +d= 7
5a+0=12
a=12/5
and
a₂-a=d
d=7-12/5
d=7-2.4
d=4.6
7=a+d...............(1)
a₇=6a+d so
19=6a+d.................(2)
by subtracting (1)and(2)
6a+d=19
- a +d= 7
5a+0=12
a=12/5
and
a₂-a=d
d=7-12/5
d=7-2.4
d=4.6
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