I
iTeachChem2mo ago
Opt

Binomial theorem/Series

I need help with questions 7 and 18. How does one solve these? I multiplied (1+x)³⁰ and (1-x)³⁰ for Q7, but got stuck midway. For Q18, I got 0, but the answer is -30C15. Idk where I went wrong.
10 Replies
TeXit
TeXit2mo ago
Couldn't find an attached image in the last 10 messages.
TeXit
TeXit2mo ago
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TeXit
TeXit2mo ago
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Opt
OptOP2mo ago
Yes I marked the answer key wrong as well in the beginning
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@Apu
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Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.
hithav
hithav2mo ago
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hithav
hithav2mo ago
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Opt
OptOP2mo ago
🤦‍♂️ I took coeff.x¹⁰ because that was the difference. that's why I went wrong. Oh yeah, this makes sense. Got it. +solved @hithav
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