Question

FOR -9,-5,-1,3.......FIND A10-A5

Answer 1

Answer:

since -9,-5,-1,3...is in A.P. we can calculate d by,

d =a2 - a1

d = 4

now to find a10 and a5

a10 = a + (n-1)d

a10 = -9 + 9x4

a10 = 27

a5 = a + (n-1)d

a5 = -9+4x4

a5 = 7

now a10 - a5 will be,

27 - 7

=20

hope it helps,

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