Question

If the 2nd term of an AP is 13 and the 5th term is 25,what is its 7th term? (a) 30,(b) 33,(c) 37,(d) 38​

Answer 1

a+d = 13

a+4d = 25

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-3d = -12

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d = 4,substitute in a+d= 13

a+4 = 13

a = 13-4

a= 9

7th term = a+6d = 9+6(4) = 33

answer is b...