if an be nth term of an A.P.and if a7=15, then the value of a2+a7+a12 is
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Answer:
Step-by-step explanation:
a7=15
a+6d=15
a2+a7+a12
a+d+a+6d+a+11d
3a+18d=3(a+6d)
3(15)
45
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