Question

if the 5th and 9th term of an ap are 22 and 32 respectively then the first term of an ap is​

Answer 1

a5=22,a9=32

a+4d=22,a+8d =32

a=22-4d,

22-4d+8d=32

4d=10

d=5/2

a=22-20/2

a=22-10

a=12

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