solve both if u know abhi bol deta hu thanks
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a+4d=13
13)a+8d=21
by solving both the equations we get
a=5 and d=2
therefore the AP is 5,7,9,....
S10=5(10+18)
=5*28
=140
13)a+8d=21
by solving both the equations we get
a=5 and d=2
therefore the AP is 5,7,9,....
S10=5(10+18)
=5*28
=140
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