The sum of first 5 term of AP is 5 & the sum of the next 10 terms is 175. Find the first three term.
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Sum of first 5 terms is
a+a+d+a+2d+a+3d+a+4d= 5a+10d= 5eq(1)
Sum of next 5 terms is
5a+35d=175 eq(2)
solve eq 1 & 2
d= 34/5
a= -63/5
first 3 terms are
-63/5 , -29/5 , 1
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