sum of nterms of an A.P is 2n^2+5n.find common difference
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compare coefficients of equal powers
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harsha226:
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to first 1st term✔✔
añ=2n²+5n
when n=1
a=2(1)²+5(1)
a=2+5
a=7✔
to find 2nd term✔✔
a2=2(2)²+5(2)
a2=8+10
a2=18✔
common difference✔✔
d=a2-a
d=18-7
d=11✔
hence common difference is 11✔✔
✨✨✨✨✨✨✨✨
hope it helps☺
please mark it as brainliest✌✌
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❤dark❤_❤ love❤
añ=2n²+5n
when n=1
a=2(1)²+5(1)
a=2+5
a=7✔
to find 2nd term✔✔
a2=2(2)²+5(2)
a2=8+10
a2=18✔
common difference✔✔
d=a2-a
d=18-7
d=11✔
hence common difference is 11✔✔
✨✨✨✨✨✨✨✨
hope it helps☺
please mark it as brainliest✌✌
〽〽〽〽〽〽〽
❤dark❤_❤ love❤
stop it
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