if the 10th term of an ap is 52 and 17 term is 20 more than its 13 term find the AP
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A+9d=52.........[1]
given that-(a+16d)-(a+12d)=20
which gives 4d=20
d=4
[keeping the value in eq, 1]
a+9×5=52
a=52-45
a=7
now we can make the Apple as 7,12,16....
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