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Find a if the 7th and 18th terms of the ...

Find `a` if the 7th and 18th terms of the expansion `(2+a)^(50)` are equal.

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CENGAGE ENGLISH-BINOMIAL THEOREM-All Questions
  1. Using the binomial theorem, evaluate (102)^5 .

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  2. Find the 6th term in expansion of (2x^2-1//3x^2)^(10)dot

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  3. Find a if the 7th and 18th terms of the expansion (2+a)^(50) are equal...

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  4. Find n , if the ratio of the fifth term from the beginning to the ...

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  5. Simplify: x^5+10 x^4a+40 x^3a^2+80 x^2a^3+80 x a^4+32 a^5dot

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  6. Find the value of (18^3+7^3+3xx18xx7xx25) /(3^6+6xx243xx2+15xx18xx4+20...

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  7. Find the approximation of (0. 99)^5 using the first three terms of its...

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  8. If for n in N ,sum(k=0)^(2n)(-1)^k(^(2n)Ck)^2=A , then find the value...

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  9. There are two bags each of which contains n balls. A man has to sele...

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  10. Find the sum sum(i=0)^r.^(n1)C(r-i) .^(n2)Ci .

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  11. Prove that sum(r=0)^(2n)(r. ^(2n)Cr)^2=n^(4n)C(2n) .

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  12. If k a n d n are positive integers and sk=1^k+2^k+3^k++n^k , then prov...

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  13. Prove that sum(r=1)^n(-1)^(r-1)(1+1/2+1/3++1/r)^n Cr=1/n .

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  14. Prove that (C1)/1-(C2)/2+(C3)/3-(C4)/4++((-1)^(n-1))/n Cn=1+1/2+1/3++1...

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  15. Prove that sum(r=0)^n^n Crsinr xcos(n-r)x=2^(n-1)sin(n x)dot

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  16. Find the last two digits of the number (23)^(14)dot

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  17. Find the last two digits of the number 27^(27)dot

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  18. Find the number of nonzero terms in the expansion of (1+3sqrt(2)x)^9+(...

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  19. Find the value of (sqrt(2)+1)^6-(sqrt(2)-1)^6dot

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  20. Using binomial theorem (without using the formula for .^n Cr) , prove ...

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