find AP if 5th term is 15 and seventh term is 35
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Answered by
3
15=a+4d...eq1
35=a+6d...eq 2
now
on sub eq 1 from eq 2
a+6d=35
a+4d=15
- -= -
...............
2d=20
d=10
put the value in eq 1
a+4×10=15
a=-25
Hope it hwlps u❤
Answered by
0
a+4d=15.................(1.)
a+6d=35....................(2.)
(in attachment)
a=-25
a+d=a2
-25+10=a2
-15=a2
a+2d=a3
-25+2(10)=a3
-25+20=a3
-5=a3
a+3d=a4
-25+30=a4
-5=a4
So,the Ap is -25,-15,-5,-5
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