Question

8) If nth terms of the APs 63, 65, 67, ... and 3, 10, 17, ... are equal, then n is
a 27
b 23
c 15
d 13​

Answer 1

a+(n-1)×d = a+(n-1)×d

63+(n-1)2 = 3+(n-1)7

63+2n-2 = 3+7n-7

61+2n = -4+7n

61+4 = 7n-2n

65 = 5n

65 / 5 = n

13 = n

$answer \: 13$

Answer 2

Step-by-step explanation:

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