15th term of the AP ,x-7,x-2,x+3,..
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answer is in the picture
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a= x-7
d = x-2 - (x-7)
d = x - 2 - x+7
d=5
t15 = a+14d
t15 = x-7 + 14(5)
t15 = x-7 + 70
t15= x + 63
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