The 3rd term of an AP is 7 and 6th term is 13 .Find the first term and common difference.
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1
A.T.Q
a+2d=7
a+5d=13
by elimination method
we get
a+2d=7
a+5d=13
- - -
________
-3d=-6
d=2
by putting d in 1 we get
a+2(2)=7
a+4=7
a=7-4
a=3
a+2d=7
a+5d=13
by elimination method
we get
a+2d=7
a+5d=13
- - -
________
-3d=-6
d=2
by putting d in 1 we get
a+2(2)=7
a+4=7
a=7-4
a=3
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2
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