If the nth term of an A.P is given by
an = 5n -3 then the sum of first 10 terms
is ?
Answers
Answered by
3
Answer:
a1=2
a2=7
a=2
d=5
sum of first 10 terms is 10/2{2a+9d}
=5×(4+45)
=5×49
=245
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gys
Answered by
2
Answer:
245
Step-by-step explanation:
- given an=5n-3 5(1)-3=2=a1 a10=5(10)-3=47 s10=n/2(a+L) =10/2(2+47) =245
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