in an ap the ratio of the 7 th term to the 10 term is -1 if ghe 16 term is -15 what is the third term
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Step-by-step explanation:
a+6d/a+9d=-1
a+6d=-a-9d
2a=-15d
a=-15d/2
a+15d=-15
-15d/2+15d=-15
-15d/2=-15
d/2=1
d=2
Third term =a+2d
-15+4
-11
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