Sum of first 10 terms of an arithmetic sequence is 350 Sum of first 15 terms is 750
Find 8th term of the sequence.
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Given:-
sum of 10 term =350
a+9d=350 ----(i)
sum of 15 term=750
a+14d=750-------(ii)
so, subtracting (i) from(ii) ,we get..
d=80------(iii)
putting the value of eq.iii in eq. i
a+9d=350
a+9*80=350------(in place of d we put the value of a+720=350.
which is given in the equation
. iii)
a=350-720
a= -370.
so now we find the value of 'a' and 'd'
now by using these values we can find 8th term.
so your answer will be
8th term⏩ 190..............✔️✔️✔️✔️
#hope it will help you#
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