The first and the last terms of an ap are 107 and 253. if there are five terms in this sequence, find the sum of sequence.
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solution.
a1= 107
=> a= 107.....(1)
& a5= 253
so, sn= n/2 (a+ l)
=> s5= 5/2 ( 107+253)
=> s5= 5/2* 360
=> S5= 5* 180
=> s5= 650
______
☺✌✌
a1= 107
=> a= 107.....(1)
& a5= 253
so, sn= n/2 (a+ l)
=> s5= 5/2 ( 107+253)
=> s5= 5/2* 360
=> S5= 5* 180
=> s5= 650
______
☺✌✌
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