The sum of the first 10 terms of an arithmetic sequence is 530. What is the first term if the last yerm is 80? what is the common difference?
I need the answer now please
I need the answer now please
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Answer:
d=6
Step-by-step explanation:
sum = n(a₁+aₙ)/2
530=10(a₁+80)/2
530=5(a₁+80)
106=a₁+80
a₁ = 26 the first term
aₙ = a₁+(n-1)d
80=26+9d
54=9d
d=6 the common difference
hope is help Sana po makatulong Yung answer ko