Anyone please help me with the question no.3nd 4......
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In the 4th ques, you may apply a very basic trick that the sum of first n odd nos. is equal to n^2. And here we can apply this logic and so a = 1 and d = 2.
So a₆ = 1 + 10 = 11 and a₂₁ = 1 + 40 = 41
And thus the answer is 11/41
nishkarsh1206:
Hey could you pls mark it brainliest.
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