Show that the sequence defined by an =5n-7 is an AP, find it's common difference
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Answered by
0
Answer:
5
Step-by-step explanation:
an=5n-7
a(1)=5(1)-7 => -2
a(2)=5(2)-7 =>3
a(3)=5(3)-7=>8
AP series=> -2, 3, 8,...
common difference= a2-a1
=> 3-(-2)
=>3+2
=>5
Answered by
0
Step-by-step explanation:
an = 5n -7
a₁ = 5 - 7 = -2
a₂ = 10 -7 = 3
a₃ = 15-7 = 8
a₂ - a₁ = 3 - (-2) = 5
a₃ - a₂ = 8 - 3 = 5
a₃ - a₂ = a₂ - a₁ = . . . . . . =5
∴ common difference d = 5
∴ The given sequence is in AP with common difference d= 5
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