Find 20th term of an AP 3rd term = 7 and 7th term exceeds 3 times the third term
by 2. Also find the nth term.
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Answer: 75
Step-by-step explanation:
equation formed are
a+2d=7
a+6d= 3(a+2d)+2
by solving second equation d gets cancelled
we get : a= -1
then we get d=4
therefeore 20th term =75
nth term = 4n-5
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